Chipset Specifications

[ Pentium/Pentium MMX | Pentium Pro/Pentium II/Pentium III | Pentium4 | Athlon/Duron | Itanium | Athlon 64/Opteron ]

 

The chipsets whose names are green italicized have not yet been released and the information is preliminary; some of it may be wrong. Take it with a grain of salt.

This chart may or may not be updated in the future. Yeah, I know, there are waaaay too many defunct and moldy chipset charts around, but nobody seemed to address the cacheability thing; which is what this page originally started out as.

Within each manufacturer's category, the chipsets are grouped roughly by Socket. Socket 5/7 processors form one group. Socket 8 forms a second. Slot 1 and Socket 370 form a third. Slot 2 forms a fourth. And the EV6 (K7) chipsets are separated into their own groupings. Because certain chipsets share the same bus (notably the P6 bus), there may be some overlap of processors. Within each group the chipsets are listed in rough chronological order. Obviously not all chipsets are listed here.

North Bridge
Pentium/Pentium MMX Chipsets
ALi Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
ALi Aladdin III P54C FPM
EDO
SDRAM		 ? ?Mbit 256MB ? N/A 50
60
66		 1/2 512KB/?-bit
?MB WT
?MB WB
ALi Aladdin IV
[M1531]
[M1533]		 P54C
P55C
Lin Burst		 FPM
EDO
SDRAM		 8 16Mbit
64Mbit		 1GB Both N/A 50
60
66
75
83		 1/2
2/5		 1MB/11-bit
512MB WB
ALi Aladdin IV+
[M1531]
[M1543]		 P54C
P55C
Lin Burst		 FPM
EDO
SDRAM
Single SIMM		 8 16Mbit
64Mbit		 1GB Both N/A 50
60
66
75
83		 1/2
2/5		 1MB/11-bit
512MB WB
ALi Aladdin V
[M1541]
[M1543]		 P54C
P55C
Lin Burst		 FPM
EDO
SDRAM		 8 16Mbit
64Mbit		 1GB Both 1x
2x		 50
60
66
75
83
100		 1/2
2/5
1/3		 1MB/8-bit
See Notes Below
ALi Aladdin V+
[M1541]
[M1543]		 P54C
P55C
Lin Burst		 FPM
EDO
SDRAM		 8 16Mbit
64Mbit
128Mbit
256Mbit		 4GB Both 1x
2x		 50
60
66
75
83
95
100		 1/2
2/5
1/3		 1MB/8-bit
See Notes Below
ALi Aladdin V+ (rev. F)
[M1542]
[M1543]		 P54C
P55C
Lin Burst		 FPM
EDO
SDRAM		 8 16Mbit
64Mbit
128Mbit
256Mbit		 4GB Both 1x
2x		 50
60
66
75
83
95
100		 1/2
2/5
1/3		 1MB/12-bit
See Notes Below
ALi Aladdin 7
[M1561]
[M1535D]
ArtX 128-bit SMA		 P54C
P55C
Lin Burst		 SDRAM PC100 8 ?Mbit 1GB ? N/A 66
100		 1/2
1/3
PCI 2.2		 ?MB/?-bit
?MB WB
AMD Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
AMD 640
[640]
[645]		 P54C
P55C
Lin Burst		 FPM
EDO
SDRAM		 6 16Mbit
64Mbit		 768MB Both N/A 50
60
66		 1/2 2MB/10-bit
See Notes Below
AMD 640AGP
[ ? ]
[VT82C586B]		 P54C
P55C
Lin Burst		 FPM
EDO
SDRAM		 6 16Mbit
64Mbit		 768MB Both 1x
2x		 66
100		 1/2
1/3		 ?MB/?-bit
?MB WT
?MB WB
Intel Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
Intel 430LX {ISA}
(Mercury)
[82434LX] (PCMC)
[82433LX] (LBX)
[82378ZB] (SIO)		 P5 FPM 6 16Mbit 192MB Parity N/A 60
66		 1/2
PCI 2.0		 512KB/9-bit
256MB WT
128MB WB
Intel 430LX {EISA}
(Mercury)
[82434LX] (PCMC)
[82433LX] (LBX)
[82374EB/SB] (ESC)
[82375EB/SB] (PCEB)		 P5 FPM 6 16Mbit 192MB Parity N/A 60
66		 1/2
PCI 2.0		 512KB/9-bit
256MB WT
128MB WB
Intel 430NX {ISA}
(Neptune)
[82434NX] (PCMC)
[82433NX] (LBX)
[82378ZB] (SIO)		 P54C Uni FPM 8 ?Mbit 512MB Parity N/A 50
60
66		 1/2
PCI 2.0		 512KB/11-bit
512MB WB
Intel 430NX {ISA}
(Neptune)
[82434NX] (PCMC)
[82433NX] (LBX)
[82379AB] (SIO.A)		 P54C Dual FPM 8 ?Mbit 512MB Parity N/A 50
60
66		 1/2
PCI 2.0		 512KB/11-bit
512MB WB
Intel 430NX {EISA}
(Neptune)
[82434NX] (PCMC)
[82433NX] (LBX)
[82374EB/SB] (ESC)
[82375EB/SB] (PCEB)		 P54C Dual FPM 8 ?Mbit 512MB Parity N/A 50
60
66		 1/2
PCI 2.0		 512KB/11-bit
512MB WB
Intel 430FX
(Triton I)
[82437FX] (TSC)
[82438FX] (TDP)
[82371FB] (PIIX)		 P54C FPM
EDO		 ? 16Mbit 128MB No N/A 60
66		 1/2
PCI 2.0		 512KB/8-bit
64MB WB
Intel 430HX
(Triton II)
[82439HX] (TXC)
[82371SB] (PIIX3)		 P54C Dual
P55C Dual		 FPM
EDO		 8 16Mbit
64Mbit		 512MB Both N/A 60
66		 1/2 512KB/11-bit
512MB WB
Intel 430VX
(Triton II/III)
[82437VX] (TVX)
[82438VX] (TDX)
[82371SB] (PIIX3)
UMA		 P54C
P55C		 FPM
EDO
SDRAM		 5 16Mbit 128MB No N/A 50
60
66		 1/2 512KB/8-bit
64MB WB
Intel 430TX
[82439TX] (MTXC)
[82371AB] (PIIX4)		 P54C
P55C		 FPM
EDO
SDRAM		 6 16Mbit
64Mbit		 256MB No N/A 50
60
66		 1/2 512KB/8-bit
64MB WB
OPTi Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds
PCI Clock
Dividers
 Max L2/
Tag bits
OPTi Python
[82C546]
[82C547]
[82C606]
[82C822]		 P5
P54C		 FPM 4 16Mbit 128MB ? N/A 50
60
66		 1/1
1/2
2/3
VLB/PCI		 512KB/?-bit
?MB WT
?MB WB
OPTi Cobra
[82C596]
[82C597]
[82C606]
[82C822]		 P5
P54C		 FPM 4 16Mbit 128MB ? N/A 50
60
66		 33MHz
VLB/PCI		 512KB/?-bit
?MB WT
?MB WB
OPTi Viper
[82C556]
[82C557]
[82C558]		 P54C
P55C
Lin Burst		 FPM
EDO
SDRAM		 6 16Mbit
64Mbit		 512MB Parity N/A 50
60
66		 1/2 512KB/8-bit
128MB WT
128MB WB
OPTi Viper-N
[82C556]
[82C557]
[82C558N]		 P54C
P55C
Lin Burst		 FPM
EDO		 6 16Mbit
64Mbit		 512MB Parity N/A 50
60
66		 1/2 512KB/8-bit
128MB WT
128MB WB
OPTi Viper-N+
[82C556M]
[82C557M]
[82C558E]		 P54C
P55C
Lin Burst		 FPM
EDO		 6 16Mbit
64Mbit		 512MB Parity N/A 50
60
66		 1/2 512KB/8-bit
128MB WT
128MB WB
OPTi ViperMax
[82C566]
[82C567]
[82C568]
UMA		 P54C
P55C
Lin Burst		 FPM
EDO
BEDO
SDRAM		 6 F
6 E
4 B
4 S		 16Mbit
64Mbit		 512MB Parity N/A 50
60
66		 1/2
Asynch		 512KB/8-bit
128MB WT
128MB WB
OPTi Viper Xpress
[82C576]
[82C577]
[82C578]		 P54C
P55C
Lin Burst		 FPM
EDO
SDRAM		 6 16Mbit
64Mbit		 512MB Parity N/A 40
50
60
66		 1/2 512KB/?-bit
?MB WT
?MB WB
OPTi Vendetta
[82C750]		 P54C
Lin Burst		 FPM
EDO
SDRAM		 8 16Mbit
64Mbit		 512MB Both N/A 50
60
66		 1/2 512KB/?-bit
?MB WT
?MB WB
SiS Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
SiS 501/02/03
[501]
[502]
[503]		 P5
P54C		 FPM
EDO		 4 16Mbit 128MB No N/A 50
60
66		 1/2
2/3
14MHz		 512MB/8-bit
128MB WT
64MB WB
SiS 5511/12/13
[5511]
[5512]
[5513]		 P54C Dual FPM
EDO
2-way Interleave
Single SIMM		 4 16Mbit 512MB Parity N/A 50
60
66		 1/2
Asynch		 1MB/8-bit
256MB WT
128MB WB
SiS 5596
(Genesis)
[5596]
[5513]
UMA		 P54C FPM
EDO		 4 16Mbit 512MB No N/A 50
60
66		 1/2
Asynch		 1MB/8-bit
256MB WT
128MB WB
SiS 5571
(Trinity)
[5571]		 P54C
P55C
Lin Burst		 FPM
EDO
SDRAM
Single SIMM		 6 F
6 E
4 S		 16MBit 384MB F
384MB E
256MB S		 No N/A 50
60
66
75		 1/2
Asynch		 512KB/8-bit
128MB WT
128MB WB
SiS 5597/98
(Jedi)
[5597]
UMA		 P54C
P55C
Lin Burst		 FPM
EDO
SDRAM
Single SIMM		 6 16Mbit
64Mbit		 384MB No N/A 50
55
60
66
75		 1/2
Asynch		 512KB/8-bit
128MB WB
SiS 5581/82
[5581/82]		 P54C
P55C
Lin Burst		 FPM
EDO
SDRAM
Single SIMM		 6 16Mbit
64Mbit		 384MB No N/A 50
55
60
66
75		 1/2
Asynch		 512KB/8-bit
128MB WB
SiS 5591/92
(David)
[5591/92]
[5595]		 P54C
P55C
Lin Burst		 FPM
EDO
SDRAM		 6 16Mbit
64Mbit		 768MB No 1x
2x		 50
60
66
75
83
100		 1/2
Asynch		 1MB/8-bit
256MB WB
SiS 530
(Sinbad)
[530]
[5595]
SiS6326 AGP
UMA		 P54C
P55C
Lin Burst		 SDRAM
Mem=3/4 Bus
Mem=4/5 Bus
Mem=5/4 Bus		 6 16Mbit
64Mbit		 1.5GB No 1x
2x		 66
75
83
95
100		 Asynch
PCI 2.2		 2MB/8-bit
256MB WB
SiS 540
[540]
[950]
[301]
SiS300 AGP		 P54C
P55C		 SDRAM PC133
VC SDRAM		 6 16Mbit
64Mbit		 1.5GB ECC 1x
2x
4x		 66
83
90
95
100		 Asynch
PCI 2.2		 2MB/?-bit
?MB WB
VIA Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
VIA VP (580VP)
[VT82C585VP]
[VT82C586]
[VT82C587VP]
UMA		 P54C
Lin Burst		 FPM
EDO
BEDO
SDRAM
Single SIMM		 6 16Mbit 512MB No N/A 50
60
66		 1/2 2MB/10-bit
~2GB WT
~2GB WB
VIA VP2
[VT82C595]
[VT82C586A]		 P54C
P55C
Lin Burst		 FPM
EDO
SDRAM		 6 16Mbit
64Mbit		 512MB ECC N/A 50
60
66		 1/2 2MB/10-bit
~2GB WT
~2GB WB
VIA VP2/97
[VT82C595]
[VT82C586B]		 P54C
P55C
Lin Burst		 FPM
EDO
SDRAM		 6 16Mbit
64Mbit		 512MB ECC N/A 50
60
66		 1/2 2MB/10-bit
~2GB WT
~2GB WB
VIA VPX
[VT82C585]
[VT82C586A]		 P54C
P55C
Lin Burst		 FPM
EDO
SDRAM		 6 16Mbit
64Mbit		 512MB No N/A 66
75		 1/2
Asynch		 2MB/10-bit
~2GB WT
~2GB WB
VIA VPX/97
[VT82C585]
[VT82C586B]		 P54C
P55C
Lin Burst		 FPM
EDO
SDRAM		 6 16Mbit
64Mbit		 512MB No N/A 66
75		 1/2
Asynch		 2MB/10-bit
~2GB WT
~2GB WB
VIA VP3
[VT82C597/597AT]
[VT82C586B]		 P54C
P55C
Lin Burst		 FPM
EDO
SDRAM
DDR SDRAM		 6 16Mbit
64Mbit		 1GB Both 1x
2x		 50
60
66		 1/2 2MB/10-bit
~2GB WT
~2GB WB
VIA MVP3
[VT82C598/598AT]
[VT82C586B]		 P54C
P55C
Lin Burst		 FPM
EDO
SDRAM
Mem=AGP		 6 16Mbit
64Mbit		 1GB Both 1x
2x		 66
75
83
100		 1/2
2/5
1/3		 2MB/8-bit
510MB WT
254MB WB
VIA MVP4
[VT8501]
[VT82C686A]
Trident Blade3D AGP		 P54C
P55C
Lin Burst		 FPM
EDO
SDRAM
VC SDRAM
Mem=AGP		 6 16Mbit
64Mbit		 768MB Both 1x
2x		 66
75
83
100 		1/2
2/5
1/3		 2MB/8-bit
510MB WT
254MB WB
VLSI Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
VLSI Lynx
[82C541]
[82C543]		 P54C FPM
EDO
SDRAM		 ? ?Mbit 256MB ? N/A 50
60
66		 1/2
Asynch		 512KB/?-bit
?MB WT
?MB WB
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Pentium Pro/Pentium II/Pentium III Chipsets
ALi Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
ALi Aladdin Pro
[ ? ]
[ ? ]		 P-II FPM
EDO
SDRAM		 ? 16Mbit
64Mbit		 ? Both 1x
2x		 60
66		 1/2 N/A
ALi Aladdin Pro II
[M1621]
[M1543]		 P-II Dual FPM
EDO
SDRAM		 8 16Mbit
64Mbit		 2GB F
2GB E
1GB S		 Both 1x
2x		 60
66
100		 1/2
1/3		 N/A
ALi Aladdin TNT2
[M1631]
[M1535D]
TNT2 AGP
UMA		 P-III
Celeron		 EDO
SDRAM PC133
VC SDRAM		 6 16Mbit
64Mbit
128Mbit
256Mbit		 1.5GB ECC 1x
2x		 66
100		 1/2
1/3
PCI 2.2		 N/A
ALi Aladdin Pro 4
[M1641B]
[M1535D]		 P-III
Celeron		 EDO
SDRAM PC133
VC SDRAM		 8 16Mbit
64Mbit
128Mbit
256Mbit		 1.5GB ECC 1x
2x
4x		 66
100		 1/2
1/3
PCI 2.2		 N/A
ALi ?
[M1642]
[M1535D]
? AGP		 P-III
Celeron		 SDRAM PC133
DDR SDRAM
VC SDRAM		 8 16Mbit
64Mbit
128Mbit
256Mbit		 ?GB ECC 1x
2x
4x		 100
133		 1/3
1/4
PCI 2.2		 N/A
ALi Aladdin Pro 5
[M1651]
[M1535D+]		 P-III
Celeron		 SDRAM PC133
VC SDRAM
DDR PC2100
Asynch Mem		 6 16Mbit
64Mbit
128Mbit
256Mbit
512Mbit		 3GB ECC 1x
2x
4x		 100
133		 1/3
1/4
Asynch
PCI 2.2		 N/A
ALi Aladdin Pro 5T
[M1651T]
[M1535D+]		 P-III
P-III(T)
Celeron		 SDRAM PC133
VC SDRAM
DDR PC2100
Asynch Mem		 6 16Mbit
64Mbit
128Mbit
256Mbit
512Mbit		 3GB ECC 1x
2x
4x		 100
133		 1/3
1/4
Asynch
PCI 2.2		 N/A
ATI Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
ATI S1-370 TL
[S1-370 TL]
[M1535D]
ArtX 128-bit UMA		 P-III
Celeron		 SDRAM PC133 ? ?Mbit ?GB ? N/A 66
100
133		 1/2
1/3
1/4
PCI 2.2		 N/A
ATI ???
[ ? ]
[ ? ]
Radeon 7000 AGP		 P-III
Celeron		 DDR PC2100 ? ?Mbit ?GB ? 1x
2x
4x
8x		 66
100
133		 1/2
1/3
1/4
PCI 2.2		 N/A
Intel Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
Intel 450GX
(Orion)
[82454GX] (PB)
[82453GX] (DC)
[82452GX] (DP)
[82451GX] (MIC)
UMA		 P6 Quad FPM
2-way Interleave
4-way Interleave		 8 16Mbit
64Mbit		 4GB Both N/A 60
66		 1/2 N/A
Intel 450KX
(Mars)
[82454KX] (PB)
[82453KX] (DC)
[82452KX] (DP)
[82451KX] (MIC)
UMA		 P6 Dual FPM
2-way Interleave		 8 16Mbit
64Mbit		 1GB Both N/A 60
66		 1/2 N/A
Intel 440FX
(Natoma)
[82441FX] (PMC)
[82442FX] (DBX)
[82371SB] (PIIX3)		 P6 Dual
P6T Dual
P-II Dual		 FPM
EDO
BEDO		 8 16Mbit
64Mbit		 1GB Both N/A 50
60
66		 1/2 N/A
Intel 440LX
[82443LX] (PAC)
[82371AB] (PIIX4)		 P-II Dual
Celeron		 EDO
SDRAM		 8 16Mbit
64Mbit		 1GB E
512MB S		 Both 1x
2x		 66 1/2 N/A
Intel 440BX
[82443BX] (PAC)
[82371EB] (PIIX4E)		 P-II Dual
P-III Dual
Celeron		 EDO
SDRAM
Reg SDRAM
ESDRAM		 6 E
8 S
8 Reg
8 ESD		 16Mbit
64Mbit
128Mbit		 1GB Both 1x
2x		 66
100		 1/2
1/3
1/4		 N/A
Intel 440EX
[82443EX] (PAC)
[82371AB/EB] (PIIX4/4E)		 P-II
Celeron		 EDO
SDRAM		 4 16Mbit
64Mbit		 256MB No 1x
2x		 66 1/2 N/A
Intel 440ZX
[82443ZX] (PAC)
[82371EB] (PIIX4E)		 P-II
Celeron		 EDO
SDRAM		 4 16Mbit
64Mbit		 256MB No 1x
2x		 66
100		 1/2
1/3		 N/A
Intel 440ZX66
[82443ZX] (PAC)
[82371EB] (PIIX4E)		 Celeron EDO
SDRAM		 4 16Mbit
64Mbit		 256MB No 1x
2x		 66 1/2 N/A
Intel 810L
(Whitney)
[82810] (GMCH)
[82801AB] (ICH0)
[82802] (FWH)
i752 AGP (Portola)		 Celeron SDRAM PC100
Asynch Mem		 4 16Mbit
64Mbit
128Mbit		 512MB No 1x
2x		 66
100		 1/2
1/3
PCI 2.2		 N/A
Intel 810
(Whitney)
[82810] (GMCH)
[82801AA] (ICH)
[82802] (FWH)
i752 AGP (Portola)		 Celeron SDRAM PC100
Asynch Mem		 4 16Mbit
64Mbit
128Mbit		 512MB No 1x
2x		 66
100		 1/2
1/3
PCI 2.2		 N/A
Intel 810-DC100
(Whitney)
[82810-DC100] (GMCH)
[82801AA] (ICH)
[82802] (FWH)
i752 AGP (Portola)		 Celeron SDRAM PC100
Asynch Mem		 4 16Mbit
64Mbit
128Mbit		 512MB No 1x
2x		 66
100		 1/2
1/3
PCI 2.2		 N/A
Intel 810e-DC133
(Whitney)
[82810E-DC133] (GMCH)
[82801AA] (ICH)
[82802] (FWH)
i752 AGP (Portola)		 P-III
P-III(T)
Celeron
See Notes Below		 SDRAM PC100
Asynch Mem		 4 16Mbit
64Mbit
128Mbit		 512MB No 1x
2x		 66
100
133		 1/2
1/3
1/4
PCI 2.2		 N/A
Intel 820
(Camino)
[82820] (MCH)
[82801AA] (ICH)
[82802] (FWH)
[82805AA] (MTH)		 P-III Dual
Celeron		 SDRAM PC100
Reg SDRAM
RDR PC800
Asynch SDRAM		 -- 64Mbit
128Mbit
256Mbit		 512MB S
1GB Reg
1GB RDR		 ECC 1x
2x
4x		 100
133		 1/3
1/4
PCI 2.2		 N/A
Intel 815
(Solano)
[82815] (GMCH)
[82801AA] (ICH)
[82802] (FWH)
i754 AGP (Coloma)		 P-III
P-III(T)
Celeron
See Notes Below		 SDRAM PC133 6 64Mbit
128Mbit
256Mbit		 512MB No 1x
2x
4x		 66
100
133		 1/2
1/3
1/4
PCI 2.2		 N/A
Intel 815e
(Solano-2)
[82815] (GMCH)
[82801BA] (ICH2)
[82802] (FWH)
i754 AGP (Coloma)		 P-III
P-III(T)
Celeron
See Notes Below		 SDRAM PC133 6 64Mbit
128Mbit
256Mbit		 512MB No 1x
2x
4x		 66
100
133		 1/2
1/3
1/4
PCI 2.2		 N/A
Intel 820e
(Camino-2)
[82820] (MCH)
[82801BA] (ICH2)
[82802] (FWH)		 P-III Dual
Celeron		 RDR PC800 -- 64Mbit
128Mbit
256Mbit		 1GB Yes 1x
2x
4x		 100
133		 1/3
1/4
PCI 2.2		 N/A
Intel 815p
(Solano-3)
[82815P] (MCH)
[82801AA] (ICH)
[82802] (FWH)		 P-III
P-III(T)
Celeron
See Notes Below		 SDRAM PC133 6 64Mbit
128Mbit
256Mbit		 512MB No 1x
2x
4x		 66
100
133		 1/2
1/3
1/4
PCI 2.2		 N/A
Intel 815ep
(Solano-3)
[82815P] (MCH)
[82801BA] (ICH2)
[82802] (FWH)		 P-III
P-III(T)
Celeron
See Notes Below		 SDRAM PC133 6 64Mbit
128Mbit
256Mbit		 512MB No 1x
2x
4x		 66
100
133		 1/2
1/3
1/4
PCI 2.2		 N/A
Intel 810e2-DC133
(Whitney)
[82810E-DC133] (GMCH)
[82801AA] (ICH2)
[82802] (FWH)
i752 AGP (Portola)		 P-III
P-III(T)
Celeron
See Notes Below		 SDRAM PC100
Asynch Mem		 4 16Mbit
64Mbit
128Mbit		 512MB No 1x
2x		 66
100
133		 1/2
1/3
1/4
PCI 2.2		 N/A
Intel 815g
(Solano-3)
[82815G] (GMCH)
[82801AA] (ICH)
[82802] (FWH)
i754 AGP (Coloma)		 P-III
P-III(T)
Celeron		 SDRAM PC133 6 64Mbit
128Mbit
256Mbit		 512MB No 1x
2x
4x		 66
100
133		 1/2
1/3
1/4
PCI 2.2		 N/A
Intel 815eg
(Solano-3)
[82815G] (GMCH)
[82801BA] (ICH2)
[82802] (FWH)
i754 AGP (Coloma)		 P-III
P-III(T)
Celeron		 SDRAM PC133 6 64Mbit
128Mbit
256Mbit		 512MB No 1x
2x
4x		 66
100
133		 1/2
1/3
1/4
PCI 2.2		 N/A
Intel 830P
(Almador)
[82830P] (MCH)
[82801CA] (ICH3)		 P-III
P-III(T)
Celeron		 SDRAM PC133
 ? 64Mbit
128Mbit
256Mbit
512Mbit		 1GB No 1x
2x
4x		 133 1/4
PCI 2.2		 N/A
Intel 830G
(Almador)
[82830G] (GMCH)
[82801CA] (ICH3)
? AGP		 P-III
P-III(T)
Celeron		 SDRAM PC133
 ? 64Mbit
128Mbit
256Mbit
512Mbit		 1GB No 1x
2x
4x		 133 1/4
PCI 2.2		 N/A
Intel 440GX
[82443GX] (PAC)
[82371EB] (PIIX4E)		 P-II Dual
P-III Dual
P2/3 Xeon Dual		 SDRAM
Reg SDRAM		 8 16Mbit
64Mbit
128Mbit
256Mbit		 2GB Both 1x
2x		 100 1/3 N/A
Intel 450NX
[82454NX] (PXB)
[82453NX] (MUX)
[82452NX] (RCG)
[82451NX] (MIOC)
[82371EB] (PIIX4E)		 P2/3 Xeon Quad FPM
EDO
2-way Interleave
4-way Interleave		 8 16Mbit
64Mbit		 8GB Both N/A 90
100		 1/3 N/A
Intel 840
(Carmel)
[82840] (MCH)
[82801AA] (ICH)
[82802] (FWH)
[82803AA] (MRH-R)
[82804AA] (MRH-S)
[82806AA] (P64H)		 P-III Dual
P3 Xeon Quad		 SDRAM PC100
Reg SDRAM
RDR DC PC800
Asynch SDRAM		 -- 64Mbit
128Mbit
256Mbit		 4GB S
8GB Reg
4GB RDR		 ECC 1x
2x
4x		 100
133		 1/3
1/4		 N/A
Intel Profusion
[ ? ]
[ ? ]		 P3 Xeon Oct SDRAM PC100
2-way Interleave		 ? ?Mbit 32GB ECC N/A 100 1/3
PCI-66/64		 N/A
Micron Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
Micron Samurai
[ ? ]
[VT82C586B]		 PII Dual FPM
EDO
SDRAM		 8 16Mbit
64Mbit		 1GB Yes N/A 66 PCI-66/64 N/A
Micron Samurai DDR
(Copperhead)
[ ? ]
[ ? ] (Coppertail)		 PIII Dual
PIII(T) Dual
P-III-S Dual		 DDR PC?
Reg DDR		 ? 512Mbit 4GB DDR
8GB Reg		 Yes 1x
2x
4x		 100
133		 PCI-X
PCI 2.2		 N/A
OPTi Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
OPTi Discovery
[82C650]
[82C651]		 P6
P6T		 ? ? ?Mbit ?MB ? N/A ? ? N/A
ServerWorks Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
SW Serverset III LE
[NB6635] (CNB30LE)
[NB6566] (CIOB20)		 P-III Dual
P-III-S Dual
P3 Xeon Dual		 SDRAM PC133
Reg SDRAM		 ? ?Mbit 4GB ECC N/A 100
133		 1/3
1/4
PCI-66/64		 N/A
SW Serverset III HE
[NB6536] (CNB20HE)
[NB6566] (CIOB20)
[NB6555IO] (OSB4)
[NB6535] (MADP)		 P-III Dual
P-III-S Dual
P3 Xeon Quad		 SDRAM QC PC133
4-way Interleave		 ? ?Mbit 16GB ECC N/A 100
133		 1/3
1/4
PCI-66/64		 N/A
SW Serverset III WS
[NB6536] (CNB20HE)
[NB6566] (CIOB20)
[NB6555] (AOB2)
[NB6525] (MADP)		 P-III Dual
P-III-S Dual
P3 Xeon Dual		 SDRAM DC PC133
2-way Interleave		 ? ?Mbit 8GB ECC 4x 100
133		 1/3
1/4
PCI-66/64		 N/A
SW Serverset III HESL
[NB-HESL]
[CIOB2]
[CSB5]		 P-III Dual
P-III-S Dual
P3 Xeon Dual		 SDRAM DC PC133
2-way Interleave		 ? ?Mbit 12GB ECC
Chipkill		 N/A 100
133		 1/3
1/4
PCI-66/64		 N/A
SiS Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
SiS 5600
[5600]
[5595]		 P-II Dual FPM
EDO
SDRAM		 6 16Mbit
64Mbit		 1.5GB ECC 1x
2x		 60
66
100		 1/2
1/3		 N/A
SiS 600
[600]
[5595]		 P-II Dual FPM
EDO
SDRAM		 6 16Mbit
64Mbit		 1.5GB ECC 1x
2x		 60
66
100		 1/2
1/3		 N/A
SiS 620
[620]
[5595]
SiS6326 AGP
UMA		 P-II SDRAM
Mem=3/4 Bus
Mem=4/5 Bus
Mem=5/4 Bus
Mem=3/2 Bus		 6 16Mbit
64Mbit
128Mbit
256Mbit		 1.5GB No 1x
2x		 60
66
75
83
100		 Asynch
PCI 2.2		 N/A
SiS 621
[621]
[5595]
SiS6326 AGP		 P-II SDRAM ? ?Mbit ?GB ? 1x
2x
4x		 66
100		 Asynch
PCI 2.2		 N/A
SiS 630
[630]
SiS301 AGP
UMA		 P-III
Celeron		 SDRAM PC133
VC SDRAM
Asynch Mem		 6 16Mbit
64Mbit
128Mbit
256Mbit
512Mbit		 3GB No 1x
2x
4x		 66
100
133		 Asynch
PCI 2.2		 N/A
SiS 630S
[630S]
SiS301 AGP		 P-III
Celeron		 SDRAM PC133
VC SDRAM
Asynch Mem		 6 16Mbit
64Mbit
128Mbit
256Mbit
512Mbit		 3GB No 1x
2x
4x		 66
100
133		 Asynch
PCI 2.2		 N/A
SiS 630E
[630E]
SiS301 AGP		 P-III
Celeron		 SDRAM PC133
Asynch Mem		 6 16Mbit
64Mbit
128Mbit
256Mbit
512Mbit		 3GB No 1x
2x
4x		 66
100
133		 Asynch
PCI 2.2		 N/A
SiS 633
[633]		 P-III SDRAM PC133
Asynch Mem		 6 16Mbit
64Mbit
128Mbit
256Mbit		 1.5GB No 1x
2x
4x		 66
100
133		 PCI 2.2 N/A
SiS 635
[635]		 P-III SDRAM PC133
DDR PC2100
Asynch Mem		 6 16Mbit
64Mbit
128Mbit
256Mbit		 1.5GB No 1x
2x
4x		 66
100
133		 PCI 2.2 N/A
SiS 635T
[635T]		 P-III
P-III(T)		 SDRAM PC133
DDR PC2100
Asynch Mem		 6 16Mbit
64Mbit
128Mbit
256Mbit		 1.5GB No 1x
2x
4x		 66
100
133		 PCI 2.2 N/A
SiS 630ST
[630ST]
SiS301 AGP		 P-III
P-III(T)
Celeron		 SDRAM PC133
VC SDRAM
Asynch Mem		 6 16Mbit
64Mbit
128Mbit
256Mbit
512Mbit		 3GB No 1x
2x
4x		 66
100
133		 Asynch
PCI 2.2		 N/A
SiS 633T
[633T]		 P-III
P-III(T)		 SDRAM PC133
Asynch Mem		 6 16Mbit
64Mbit
128Mbit
256Mbit		 1.5GB No 1x
2x
4x		 66
100
133		 PCI 2.2 N/A
SiS 630ET
[630ET]
SiS301 AGP		 P-III
P-III(T)
Celeron		 SDRAM PC133
Asynch Mem		 6 16Mbit
64Mbit
128Mbit
256Mbit
512Mbit		 3GB No 1x
2x
4x		 66
100
133		 Asynch
PCI 2.2		 N/A
SiS 640T
[640T]
[961]
SiS 315 AGP		 P-III
P-III(T)		 SDRAM PC133
DDR SDRAM		 ? ?Mbit 1.5GB ? 1x
2x
4x		 66
100
133		 PCI 2.2 N/A
VIA Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
VIA Apollo
[VT82C685]
[VT82C586]
[VT82C687]		 P6 Dual
P6T Dual		 FPM
EDO		 8 16Mbit
64Mbit		 1GB ? N/A 66 1/2 N/A
VIA Apollo Pro
[VT82C691]
[VT82C586B]		 P6
P6T
P-II		 FPM
EDO
SDRAM
DDR SDRAM
ESDRAM
VC SDRAM
Mem=AGP		 8 16Mbit
64Mbit		 1GB Both 1x
2x		 66
100		 1/2
2/5
1/3		 N/A
VIA Apollo Pro+
[VT82C693]
[VT82C596A]		 P6
P6T
P-II		 FPM
EDO
SDRAM
VC SDRAM
Mem=AGP		 8 16Mbit
64Mbit
128Mbit		 1GB Both 1x
2x		 66
100		 1/2
2/5
1/3		 N/A
VIA Apollo Pro133
[VT82C693A]
[VT82C596B]		 P-III
Celeron		 FPM
EDO
SDRAM PC133
VC SDRAM
Mem=AGP
Mem=2/3 Bus
Mem=3/4 Bus
Mem=4/3 Bus
Mem=3/2 Bus		 6 16Mbit
64Mbit
128Mbit
256Mbit		 1.5GB Both 1x
2x		 66
100
133		 1/2
2/5
1/3
1/4
PCI 2.2		 N/A
VIA Apollo Pro133A
[VT82C694X]
[VT82C596B]		 P-III Dual
Celeron		 FPM
EDO
SDRAM PC133
Reg SDRAM
ESDRAM
VC SDRAM
Mem=AGP
Mem=2/3 Bus
Mem=3/4 Bus
Mem=4/3 Bus
Mem=3/2 Bus		 8 16Mbit
64Mbit
128Mbit
256Mbit		 2GB
4GB Reg		 Both 1x
2x
4x		 66
100
133		 1/2
2/5
1/3
1/4
PCI 2.2		 N/A
VIA PLE133 (PM601)
[VT8601]
[VT8231]
Trident Blade3D AGP		 P-III
Celeron		 FPM
EDO
SDRAM PC133
VC SDRAM
Mem=2/3 Bus
Mem=3/4 Bus
Mem=4/3 Bus
Mem=3/2 Bus		 6 16Mbit
64Mbit
128Mbit
256Mbit		 1.5GB No 1x
2x		 66
100
133		 1/2
1/3
1/4
PCI 2.2		 N/A
VIA PL-133
[VT8604]
[VT8231]
Savage4 AGP		 P-III
Celeron		 FPM
EDO
SDRAM PC133
ESDRAM
VC SDRAM
Mem=AGP
Mem=2/3 Bus
Mem=3/4 Bus
Mem=4/3 Bus
Mem=3/2 Bus		 6 16Mbit
64Mbit
128Mbit
256Mbit		 1.5GB Both 1x
2x
4x		 66
100
133		 1/2
1/3
1/4
PCI 2.2		 N/A
VIA PM-133
(VS1-P6)
[VT8605]
[VT8231]
Savage4 AGP		 P-III
Celeron		 FPM
EDO
SDRAM PC133
ESDRAM
VC SDRAM
Mem=AGP
Mem=2/3 Bus
Mem=3/4 Bus
Mem=4/3 Bus
Mem=3/2 Bus		 6 16Mbit
64Mbit
128Mbit
256Mbit		 1.5GB Both 1x
2x
4x		 66
100
133		 1/2
1/3
1/4
PCI 2.2		 N/A
VIA Apollo Pro266
[VT8633]
[VT8233]		 P-III
Celeron		 SDRAM PC133
Reg SDRAM
VC SDRAM
DDR PC2100		 8 128Mbit
256Mbit
512Mbit		 2GB ECC 1x
2x
4x		 66
100
133		 1/2
1/3
1/4
PCI 2.2		 N/A
VIA PLE133T
[VT8602]
[VT8231]
Trident Blade3D AGP		 P-III
P-III(T)
Celeron		 FPM
EDO
SDRAM PC133
VC SDRAM
Mem=2/3 Bus
Mem=3/4 Bus
Mem=4/3 Bus
Mem=3/2 Bus		 6 16Mbit
64Mbit
128Mbit
256Mbit		 1.5GB No 1x
2x		 66
100
133		 1/2
1/3
1/4
PCI 2.2		 N/A
VIA PL-133T
[VT8604T]
[VT8231]
Savage4 AGP		 P-III
P-III(T)
Celeron		 FPM
EDO
SDRAM PC133
ESDRAM
VC SDRAM
Mem=AGP
Mem=2/3 Bus
Mem=3/4 Bus
Mem=4/3 Bus
Mem=3/2 Bus		 6 16Mbit
64Mbit
128Mbit
256Mbit		 1.5GB Both 1x
2x
4x		 66
100
133		 1/2
1/3
1/4
PCI 2.2		 N/A
VIA Apollo Pro133T
[VT82C694T]
[VT82C596B]		 P-III
P-III(T)
Celeron		 FPM
EDO
SDRAM PC133
Reg SDRAM
ESDRAM
VC SDRAM
Mem=AGP
Mem=2/3 Bus
Mem=3/4 Bus
Mem=4/3 Bus
Mem=3/2 Bus		 8 16Mbit
64Mbit
128Mbit
256Mbit		 2GB
4GB Reg		 Both 1x
2x
4x		 66
100
133		 1/2
2/5
1/3
1/4
PCI 2.2		 N/A
VIA Apollo Pro266T
[VT8653]
[VT8233]
[VT8101] (VPX)		 P-III
P-III(T)
Celeron		 SDRAM PC133
Reg SDRAM
VC SDRAM
DDR PC2100
Reg DDR		 8 128Mbit
256Mbit
512Mbit		 4GB ECC 1x
2x
4x		 66
100
133		 1/2
1/3
1/4
PCI 2.2		 N/A
VIA PM-266T
(VS10-P6)
[VT8608]
[ ? ]
Savage4 AGP		 P-III
P-III(T)
Celeron		 SDRAM PC133
DDR PC2100		 ? ?Mbit ?GB ? 1x
2x
4x		 100
133		 1/3
1/4
PCI 2.2		 N/A
VIA Apollo Pro333T
[ ? ]
[ ? ]		 P-III
P-III(T)
Celeron		 SDRAM PC133
Reg SDRAM
DDR PC2700
Reg DDR		 ? ?Mbit ?GB ECC 1x
2x
4x
8x		 66
100
133		 1/2
1/3
1/4
PCI 2.2		 N/A
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Pentium 4 Chipsets
ALi Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
ALi Aladdin P4
[M1671]
[M1535D+]		 P-4 SDRAM PC133
DDR PC2700
Asynch Mem		 6 64Mbit
128Mbit
256Mbit
512Mbit		 3GB No 1x
2x
4x		 100 (x4) 1/3
Asynch
PCI 2.2		 N/A
ALi Aladdin M1671
[M1671A]
[M1535D+]		 P-4 SDRAM PC133
DDR PC2700
Asynch Mem		 6 64Mbit
128Mbit
256Mbit
512Mbit		 3GB No 1x
2x
4x		 100 (x4)
133 (x4)		 1/3
1/4
Asynch
PCI 2.2		 N/A
ALi M1681
[M1681]
[M1563]		 P-4 SDRAM PC133
DDR PC3200
Asynch		 ? 64Mbit
128Mbit
256Mbit
512Mbit
1Gbit
2Gbit
 ?GB ? 1x
2x
4x
8x
1.5v		 100 (x4)
133 (x4)		 1/3
1/4
PCI 2.2		 N/A
ALi M1683
[M1683]
[M1563]		 P-4 SDRAM PC133
DDR PC3200
Asynch		 ? ?Mbit ?GB ? 1x
2x
4x
8x
1.5v		 100 (x4)
133 (x4)
200 (x4)		 1/3
1/4
PCI 2.2		 N/A
ALi M1741
[M1741]
[ ? ]		 P-4 ? ? ?Mbit ?GB ? ? 100 (x4) 1/3
PCI 2.2		 N/A
ATI Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
ATI IGP 330
[IGP 330]
[IXP 200]
Radeon 7000 AGP		 P-4 DDR PC2100 ? ?Mbit ?GB ? 1x
2x
4x		 100 (x4) ? N/A
ATI IGP 340
[IGP 340]
[IXP 200]
Radeon 7000 AGP		 P-4 DDR PC2100 ? ?Mbit ?GB ? 1x
2x
4x		 100 (x4)
133 (x4)		 ? N/A
ATI ???
[IGP ?]
[IXP ?]
Radeon 8500 AGP		 P-4 DDR PC2700 ? ?Mbit ?GB ? 1x
2x
4x		 100 (x4)
133 (x4)		 ? N/A
ATI IGP ?
(RS-250)
[IGP ?]
[IXP 210]
Radeon 7000 AGP		 P-4 DDR PC2700 ? ?Mbit ?GB ? 1x
2x
4x		 100 (x4)
133 (x4)		 ? N/A
ATI Radeon 9100 IGP
(RS-300)
[IGP ?]
[IXP 250SB]
Radeon 9100 AGP		 P-4 DDR DC PC3200 ? ?Mbit 4GB ? 1x
2x
4x
8x		 100 (x4)
133 (x4)
200 (x4)		 ? N/A
ATI ???
(RS-300VE)
[IGP ?]
[IXP 300SB]
Radeon 9100 AGP		 P-4 DDR PC3200 ? ?Mbit ?GB ? 1x
2x
4x
8x		 100 (x4)
133 (x4)
200 (x4)		 ? N/A
ATI ???
(RS-400)
[IGP ?]
[IXP 250SB]
Radeon 9600 AGP		 P-4 DDR DC PC3200 ? ?Mbit 4GB ? 1x
2x
4x
8x		 100 (x4)
133 (x4)
200 (x4)		 ? N/A
IBM Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
IBM Summit
[ ? ]
[ ? ]		 P4 Xeon Quad DDR PC? ? ?Mbit ?GB Chipkill ? 100 (x4) 1/3
PCI-X		 N/A
Intel Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
Intel 850
(Tehama)
[82850] (MCH)
[82801BA] (ICH2)
[82802] (FWH)		 P-4 RDR DC PC800 -- 128Mbit
256Mbit		 2GB ECC 1x
2x
4x
1.5v		 100 (x4) 1/3
1/4
PCI 2.2		 N/A
Intel 845
(Brookdale)
[82845] (MCH)
[82801BA] (ICH2)
[82802AB] (FWH)		 P-4 SDRAM PC133 6 64Mbit
128Mbit
256Mbit
512Mbit		 3GB ECC 1x
2x
4x
1.5v		 100 (x4) 1/3
PCI 2.2		 N/A
Intel 855
(Tulloch)
[82855] (MCH)
[82801CA] (ICH3)		 P-4 RDR 4i 32 PC1066 -- 64Mbit
128Mbit
256Mbit		 2GB Yes 1x
2x
4x
8x		 100 (x4)
133 (x4)		 1/3
1/4
PCI 2.2		 N/A
Intel 845B
(Brookdale DDR)
[82845] (MCH)
[82801BA] (ICH2)
[82802AC] (FWH)		 P-4 DDR PC2100 4 64Mbit
128Mbit
256Mbit
512Mbit		 2GB ECC 1x
2x
4x
1.5v		 100 (x4) 1/3
PCI 2.2		 N/A
Intel 850E
(Tehama-E)
[82850E] (MCH)
[82801BA] (ICH2)
[82802] (FWH)		 P-4 RDR DC PC1066 -- 128Mbit
256Mbit		 2GB ECC 1x
2x
4x
1.5v		 100 (x4)
133 (x4)		 1/3
1/4
PCI 2.2		 N/A
Intel 845E
(Brookdale DDR)
[82845E] (MCH)
[82801DB] (ICH4)		 P-4 DDR PC2100 4 64Mbit
128Mbit
256Mbit
512Mbit		 2GB ECC 1x
2x
4x
1.5v		 100 (x4)
133 (x4)		 1/3
1/4
PCI 2.2		 N/A
Intel 845G
(Brookdale-G)
[82845G] (GMCH)
[82801DB] (ICH4)
Intel Extreme AGP		 P-4 SDRAM PC133
DDR PC2100		 4 64Mbit
128Mbit
256Mbit
512Mbit		 2GB no 1x
2x
4x
1.5v		 100 (x4)
133 (x4)		 1/3
1/4
PCI 2.2		 N/A
Intel 845GL
(Brookdale-GL)
[82845GL] (GMCH)
[82801DB] (ICH4)
Intel Extreme AGP		 P-4 SDRAM PC133
DDR PC2100		 4 64Mbit
128Mbit
256Mbit
512Mbit		 2GB no 1x
2x
4x		 100 (x4)
133 (x4)		 1/3
1/4
PCI 2.2		 N/A
Intel 845GE
(Brookdale-G)
[82845GE] (GMCH)
[82801DB] (ICH4)
Intel Extreme AGP		 P-4 DDR PC2700 4 64Mbit
128Mbit
256Mbit
512Mbit		 2GB no 1x
2x
4x
1.5v		 100 (x4)
133 (x4)		 1/3
1/4
PCI 2.2		 N/A
Intel 845GV
(Brookdale-GV)
[82845GE] (GMCH)
[82801DB] (ICH4)
Intel Extreme AGP		 P-4 DDR PC2100 4 64Mbit
128Mbit
256Mbit
512Mbit		 2GB no 1x
2x
4x		 100 (x4)
133 (x4)		 1/3
1/4
PCI 2.2		 N/A
Intel 845PE
(Brookdale DDR)
[82845PE] (MCH)
[82801DB] (ICH4)		 P-4 DDR PC2700 4 64Mbit
128Mbit
256Mbit
512Mbit		 2GB ECC 1x
2x
4x
1.5v		 100 (x4)
133 (x4)		 1/3
1/4
PCI 2.2		 N/A
Intel E7205
(Granite Bay)
[E7205] (MCH)
[82801DB] (ICH4)		 P-4 DDR DC PC2100
Reg DDR		 8 128Mbit
256Mbit
512Mbit		 2GB DDR
4GB Reg		 ECC 1x
2x
4x
8x
0.8v
1.5v		 100 (x4)
133 (x4)		 1/3
1/4
PCI 2.2		 N/A
Intel 875P
(Canterwood)
[82875P] (MCH)
[82801EB] (ICH5)		 P-4 DDR DC PC3200
Mem=2/3 bus
Mem=4/5 bus
Mem=4/3 bus
Mem=5/4 bus		 8 128Mbit
256Mbit
512Mbit		 4GB ECC 1x
4x
8x
0.8v
1.5v		 100 (x4)
133 (x4)
200 (x4)		 1/3
1/4
1/6
PCI 2.3		 N/A
Intel 865P
(Springdale-P)
[82865P] (MCH)
[82801EB] (ICH5)		 P-4 DDR DC PC2700
Mem=2/3 bus
Mem=4/5 bus
Mem=4/3 bus
Mem=5/4 bus		 8 128Mbit
256Mbit
512Mbit		 4GB no 1x
4x
8x
0.8v
1.5v		 100 (x4)
133 (x4)		 PCI 2.3 N/A
Intel 865PE
(Springdale-PE)
[82865PE] (MCH)
[82801EB] (ICH5)		 P-4 DDR DC PC3200
Mem=2/3 bus
Mem=4/5 bus
Mem=4/3 bus
Mem=5/4 bus		 8 128Mbit
256Mbit
512Mbit		 4GB no 1x
4x
8x
0.8v
1.5v		 100 (x4)
133 (x4)
200 (x4)		 PCI 2.3 N/A
Intel 865G
(Springdale-G)
[82865G] (GMCH)
[82801EB] (ICH5)
? IGD UMA		 P-4 DDR DC PC3200
Mem=2/3 bus
Mem=4/5 bus
Mem=4/3 bus
Mem=5/4 bus		 8 128Mbit
256Mbit
512Mbit		 4GB no 1x
4x
8x
0.8v
1.5v		 100 (x4)
133 (x4)
200 (x4)		 PCI 2.3 N/A
Intel ?
(Grantsdale)
[ ? ] (MCH)
[ ? ] (ICH6)		 P-4 DDR DC PC3200
DDR II DC PC4300		 ? ?Mbit 4GB no 1x
2x
4x
8x		 133 (x4)
200 (x4)		 PCI Express N/A
Intel ?
(Grantsdale-G)
[ ? ] (GMCH)
[ ? ] (ICH6)
? AGP		 P-4 DDR DC PC3200
DDR II DC PC4300		 ? ?Mbit 4GB no 1x
2x
4x
8x		 133 (x4)
200 (x4)		 PCI Express N/A
Intel ?
(Copper River)
[ ? ] (MCH)
[ ? ] ( ? )		 P-4 DDR ? ? ?Mbit ?GB no ?x 133 (x4)
200 (x4)
266 (x4)		 PCI ? N/A
Intel 860
(Colusa)
[82860] (MCH)
[82801BA] (ICH2)
[82802] (FWH)
[82803AA] (MRH-R)
[82806AA] (P64H)		 P4 Xeon Dual RDR DC PC800 -- 256Mbit 4GB ECC 1x
2x
4x
1.5v		 100 (x4) 1/3
PCI 2.2		 N/A
Intel E7500
(Plumas)
[E7500] (MCH)
[82870P2] (P64H2)
[82801CA] (ICH3-S)		 P4 Xeon Dual DDR DC PC1600
Reg DDR		 ? 64Mbit
128Mbit
256Mbit
512Mbit		 16GB ECC
Chipkill		 N/A 100 (x4) 1/3
PCI-X
PCI 2.2		 N/A
Intel E7501
(Plumas 533)
[E7501] (MCH)
[82870P2]
[82801CA] (ICH3-S)		 P4 Xeon Dual DDR DC PC2100
Reg DDR		 ? 64Mbit
128Mbit
256Mbit
512Mbit		 16GB ECC
Chipkill		 N/A 100 (x4)
133 (x4)		 1/3
1/4
PCI-X
PCI 2.2		 N/A
Intel E7505
(Placer)
[E7505] (MCH)
[82870P2]
[82801DB] (ICH4)		 P4 Xeon Dual DDR DC PC2100
Reg DDR		 8 128Mbit
256Mbit
512Mbit
1Gbit		 16GB ECC
Chipkill		 1x
2x
4x
8x		 100 (x4)
133 (x4)		 Asynch
PCI-X
PCI 2.2		 N/A
Intel 870
[ ? ]
[ ? ]		 P4 Xeon Quad DDR DC PC1600
2-way Interleave		 ? 512Mbit
1Gbit		 ?GB Parity
MCA		 1x
2x
4x		 100 (x4) 1/3
PCI-X		 N/A
Intel 860E
(Colusa-E)
[ ? ] (MCH)
[82801BA] (ICH2)
[82802] (FWH)
[82803AA] (MRH-R)
[82806AA] (P64H)		 P4 Xeon Dual RDR DC PC? -- 256Mbit 4GB ECC 1x
2x
4x
1.5v		 100 (x4)
133 (x4)		 1/3
1/4
PCI 2.2		 N/A
Intel ?
(Plumas LE)
[ ? ] (MCH)
[ ? ]
[82801CA] (ICH3-S)		 P4 Xeon Dual DDR PC2100 ? ?Mbit ?GB ECC
Chipkill		 ? 100 (x4)
133 (x4)		 1/3
1/4
?		 N/A
Intel ?
(Lindenhurst)
[ ? ] (MCH)
[ ? ]
[ ? ] (ICH6)		 P4 Xeon Dual? DDR ? ? ?Mbit ?GB ECC
Chipkill		 ? 100 (x4)
133 (x4)
200 (x4)		 PCI Express? N/A
ServerWorks Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
SW Serverset IV
[ ? ]
[ ? ]		 P4 Xeon Dual DDR SDRAM ? ?Mbit ?GB Yes ? 100 (x4) ? N/A
SW Grand Champion LE
[CMIC LE]
[CIOB-X2]
[CSB5]		 P4 Xeon Dual DDR DC PC1600
2-way Interleave		 ? ?Mbit 16GB ECC
Chipkill		 N/A 100 (x4) PCI-X
PCI 2.2		 N/A
SW Grand Champion WS
[CMIC WS]
[CIOB-X]
[CSB5]
[CIOB-G]		 P4 Xeon Dual DDR DC PC1600
2-way Interleave		 ? ?Mbit 16GB ECC
Chipkill		 1x
2x
4x		 100 (x4) PCI-X
PCI 2.2		 N/A
SW Grand Champion HE
[CMIC HE]
[CIOB-X]
[CSB5]		 P4 Xeon Quad DDR QC PC1600
4-way Interleave		 ? ?Mbit 64GB ECC
Chipkill		 N/A 100 (x4) PCI-X
PCI 2.2		 N/A
SW Grand Champion SL
[CMIC SL]
[CIOB-X2]
[CSB6]		 P4 Xeon Dual DDR PC1600 ? ?Mbit 8GB ECC
Chipkill		 N/A 100 (x4) PCI-X
PCI 2.2		 N/A
SiS Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
SiS 645
[645]
[961]		 P-4 SDRAM PC133
DDR PC2700
Mem=4/3 Bus
Mem=5/3 Bus		 6 16Mbit
64Mbit
128Mbit
256Mbit
512Mbit		 3GB No 1x
2x
4x		 100 (x4) 1/3
PCI 2.2		 N/A
SiS 650
[650]
[961]
SiS 315 AGP		 P-4 SDRAM PC133
DDR PC2700
Mem=4/3 Bus
Mem=5/3 Bus		 6 16Mbit
64Mbit
128Mbit
256Mbit
512Mbit		 3GB No 1x
2x
4x		 100 (x4) 1/3
PCI 2.2		 N/A
SiS 645DX
[645DX]
[961B]		 P-4 SDRAM PC133
DDR PC2700
Mem=4/3 Bus
Mem=5/3 Bus		 6 16Mbit
64Mbit
128Mbit
256Mbit
512Mbit		 3GB No 1x
2x
4x		 100 (x4)
133 (x4)		 1/3
1/4
PCI 2.2		 N/A
SiS 650GX
[650GX]
[961]
SiS 315 AGP		 P-4 SDRAM PC133
DDR PC2700
Mem=4/3 Bus
Mem=5/3 Bus		 6 16Mbit
64Mbit
128Mbit
256Mbit
512Mbit		 3GB No 1x
2x
4x		 100 (x4) 1/3
PCI 2.2		 N/A
SiS 651
[651]
[962]
? AGP		 P-4 SDRAM PC133
DDR PC2700
Mem=4/3 Bus
Mem=5/3 Bus		 6 16Mbit
64Mbit
128Mbit
256Mbit
512Mbit		 3GB No 1x
2x
4x		 100 (x4)
133 (x4)		 1/3
1/4
PCI 2.2		 N/A
SiS 648
[648]
[963]		 P-4 SDRAM PC133
DDR PC2700		 6 16Mbit
64Mbit
128Mbit
256Mbit
512Mbit		 3GB No 1x
2x
4x
8x		 100 (x4)
133 (x4)		 1/3
1/4
PCI 2.2		 N/A
SiS R658
[R658]
[963]		 P-4 RDR 32 DC PC1200 -- ?Mbit 4GB ECC 1x
2x
4x
8x		 100 (x4)
133 (x4)		 1/3
1/4		 N/A
SiS 648DX
[648DX]
[963]		 P-4 SDRAM PC133
DDR PC3200		 6 16Mbit
64Mbit
128Mbit
256Mbit
512Mbit		 3GB No 1x
2x
4x
8x		 100 (x4)
133 (x4)		 1/3
1/4
PCI 2.2		 N/A
SiS 655
[655]
[963]		 P-4 SDRAM PC133
DDR DC PC2700
Mem=4/3 Bus
Mem=5/3 Bus		 6 16Mbit
64Mbit
128Mbit
256Mbit
512Mbit		 3GB No 1x
2x
4x
8x		 100 (x4)
133 (x4)		 1/3
1/4
PCI 2.2		 N/A
SiS 648FX
[648FX]
[963L]		 P-4 SDRAM PC133
DDR PC3200		 6 16Mbit
64Mbit
128Mbit
256Mbit
512Mbit		 3GB No 1x
2x
4x
8x		 100 (x4)
133 (x4)
200 (x4)		 1/3
1/4
1/6
PCI 2.2		 N/A
SiS R659
[R659]
[964]		 P-4 RDR 64 QC PC1200 -- ?Mbit ?GB ECC 4x
8x
1.5v		 100 (x4)
133 (x4)
200 (x4)		 1/3
1/4
1/6		 N/A
SiS 660
[660]
[963]
? AGP		 P-4 DDR DC PC2700 6 16Mbit
64Mbit
128Mbit
256Mbit
512Mbit		 3GB No 1x
2x
4x
8x		 100 (x4)
133 (x4)		 1/3
1/4		 N/A
SiS 661FX
[661FX]
[964]
SiS 301C AGP		 P-4 DDR DC PC3200 6 16Mbit
64Mbit
128Mbit
256Mbit
512Mbit		 3GB No 4x
8x
1.5v		 100 (x4)
133 (x4)
200 (x4)		 1/3
1/4
1/6		 N/A
SiS 655FX
[655FX]
[964]		 P-4 DDR DC PC3200 ? ?Mbit 4GB No 4x
8x
1.5v		 100 (x4)
133 (x4)
200 (x4)		 1/3
1/4
1/6
PCI 2.2		 N/A
VIA Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
VIA P4X-266
[VT8753]
[VT8233]
[VT8101] (VPX)		 P-4 SDRAM PC133
Reg SDRAM
DDR PC2100
Reg DDR
Mem=4/3 Bus		 ? ?Mbit 4GB ECC 1x
2x
4x		 100 (x4) 1/3
1/4
PCI 2.2		 N/A
VIA P4M-266
[VT8751]
[VT8233]
Savage8 AGP		 P-4 SDRAM PC133
Reg SDRAM
DDR PC2100
Reg DDR
Mem=4/3 Bus		 ? ?Mbit 4GB ECC 1x
2x
4x		 100 (x4) 1/3
1/4
PCI 2.2		 N/A
VIA P4X-266A
[VT8753]
[VT8233]
[VT8101] (VPX)		 P-4 SDRAM PC133
Reg SDRAM
DDR PC2100
Reg DDR
Mem=4/3 Bus		 ? ?Mbit 4GB ECC 1x
2x
4x		 100 (x4)
133 (x4)		 1/3
1/4
PCI 2.2		 N/A
VIA P4X-333
[VT8754]
[VT8235]		 P-4 SDRAM PC133
Reg SDRAM
DDR PC2700
Reg DDR
Mem=4/3 Bus
Mem=5/3 Bus		 ? ?Mbit 32GB ECC 1x
2x
4x
8x		 100 (x4)
133 (x4)		 PCI ? N/A
VIA P4X-266E
[VT8753A]
[VT8233A]
[VT8101] (VPX)		 P-4 SDRAM PC133
Reg SDRAM
DDR PC2100
Reg DDR
Mem=4/3 Bus		 ? ?Mbit 4GB ECC 1x
2x
4x		 100 (x4)
133 (x4)		 1/3
1/4
PCI 2.2		 N/A
VIA P4X-400
[VT?]
[VT8235]
[VT8101] (VPX)		 P-4 DDR PC3200
Mem=3/2 Bus
Mem=4/3 Bus
Mem=5/3 Bus		 ? ?Mbit ?GB ? 1x
2x
4x
8x		 100 (x4)
133 (x4)		 1/3
1/4
PCI 2.2		 N/A
VIA PT-800
[ ? ]
[VT8237]
[ ? ] (VPX-II)		 P-4 DDR PC3200 ? ?Mbit 8GB ECC 1x
2x
4x
8x		 100 (x4)
133 (x4)
200 (x4)		 PCI 2.2 N/A
VIA P4M-266A
[ ? ]
[VT8233]
Savage8 AGP		 P-4 SDRAM PC133
Reg SDRAM
DDR PC2100
Reg DDR
Mem=4/3 Bus		 ? ?Mbit 4GB ECC 1x
2x
4x		 100 (x4)
133 (x4)		 1/3
1/4
PCI 2.2		 N/A
VIA P4M-333
[ ? ]
[VT8235]
[ ? ] (VPX-II)
Zoetrope AGP		 P-4 SDRAM PC133
Reg SDRAM
DDR PC2700
Reg DDR
Mem=4/3 Bus
Mem=5/3 Bus		 ? ?Mbit ?GB ECC 1x
2x
4x
8x		 100 (x4)
133 (x4)		 PCI ? N/A
VIA P4X-400A
[VT?]
[VT8235]
[VT8101] (VPX)		 P-4 DDR PC3200
Mem=3/2 Bus
Mem=4/3 Bus
Mem=5/3 Bus		 ? ?Mbit ?GB ? 1x
2x
4x
8x		 100 (x4)
133 (x4)
200 (x4)		 1/3
1/4
1/6
PCI 2.2		 N/A
VIA PT-600
[ ? ]
[VT8235]
[ ? ] (VPX-II)		 P-4 DDR DC PC3200
Reg DDR		 ? ?Mbit ?GB ECC 1x
2x
4x
8x		 100 (x4)
133 (x4)
200 (x4)		 PCI ? N/A
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Athlon/Duron Chipsets
ALi Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
ALi MAGiK 1
[M1647]
[M1535D+]		 K7
Duron		 SDRAM PC133
DDR PC2100
Asynch Mem		 6 16Mbit
64Mbit
128Mbit
256Mbit
512Mbit		 3GB ? 1x
2x
4x		 100 (x2)
133 (x2)		 1/3
1/4
Asynch
PCI 2.2		 N/A
ALi MAGiK 2
[M1648]
[ ? ]
? AGP		 K7
Duron		 SDRAM PC133
DDR PC2100		 ? ?Mbit ?GB ? 1x
2x
4x		 100 (x2)
133 (x2)		 1/3
1/4
Asynch
PCI 2.2		 N/A
ALi Aladdin K7 III
[M1657]
[ ? ]		 K7
Duron		 SDRAM PC133
DDR PC2100		 ? ?Mbit ?GB ? 1x
2x
4x		 100 (x2)
133 (x2)		 1/3
1/4
Asynch
PCI 2.2		 N/A
ALi ?
[M1667]
[M1563]		 K7
Duron		 SDRAM PC133
DDR PC2700		 ? ?Mbit ?GB ? 1x
2x
4x
8x		 100 (x2)
133 (x2)		 ? N/A
AMD Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
AMD 750
[751] (Irongate)
[756] (Viper)		 K7
Duron		 SDRAM PC100 8 16Mbit
64Mbit
128Mbit		 768MB ECC 1x
2x		 100 (x2) 1/3
PCI 2.2		 N/A
AMD 760
[761] (Irongate-4)
[766]		 K7
Duron		 DDR PC2100
Reg DDR		 8 64Mbit
128Mbit
256Mbit
512Mbit		 2GB
4GB Reg		 ECC 1x
2x
4x		 100 (x2)
133 (x2)		 1/3
1/4
PCI 2.2		 N/A
AMD 760MP
[762] (Irongate-4)
[766]		 Athlon MP Dual Reg DDR PC2100 8 64Mbit
128Mbit
256Mbit
512Mbit		 4GB ECC 1x
2x
4x		 100 (x2)
133 (x2)		 Pseudosynch
PCI 2.2		 N/A
AMD 760MPX
[762] (Irongate-4)
[768]		 Athlon MP Dual Reg DDR PC2100 8 64Mbit
128Mbit
256Mbit
512Mbit		 4GB ECC 1x
2x
4x		 100 (x2)
133 (x2)		 Pseudosynch
PCI-66/64
PCI 2.2		 N/A
AMD 770
[ ? ]
[ ? ]		 Athlon MP Dual DDR PC? 8 ?Mbit ?GB Yes 1x
2x
4x		 100 (x2)
133 (x2)		 Pseudosynch N/A
ATI Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
ATI IGP 320
[IGP 320]
[IXP 200]
Radeon 7000 AGP		 K7
Duron		 SDRAM PC133
DDR PC2100		 ? ?Mbit ?GB ? 1x
2x
4x
1.5v		 100 (x2)
133 (x2)		 ? N/A
ATI ???
[IGP ?]
[IXP ?]
Radeon 8500 AGP		 K7
Duron		 SDRAM PC133
DDR PC2700		 ? ?Mbit ?GB ? 1x
2x
4x
1.5v		 100 (x2)
133 (x2)		 ? N/A
Micron Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
Micron Samurai K7
[ ? ]
[ ? ]		 K7 Dual DDR SDRAM ? ?Mbit ?GB Yes 1x
2x
4x		 100 (x2) PCI-66/64 N/A
Micron Mamba
[4400e]
[ ? ]		 K7 DDR SDRAM ? ?Mbit ?GB Yes 1x
2x
4x		 133 (x2) PCI-X 8MB L3/?-bit
Micron Shogun
[ ? ]
[ ? ]
Rendition AGP		 K7 DDR SDRAM ? ?Mbit ?GB Yes 1x
2x
4x		 133 (x2) PCI-X 8MB L3/?-bit
Micron Scimitar
[ ? ]
[ ? ]
Rendition AGP		 K7 DDR SDRAM ? ?Mbit ?GB Yes 1x
2x
4x		 133 (x2) ? 8MB L3/?-bit
NVidia Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
NVidia nForce220
(Crush11)
[IGP-64]
[MCP]
GeForce2 MX		 K7
Duron		 SDRAM PC133
DDR PC2100
Asynch Mem		 6 64Mbit
128Mbit
256Mbit
512Mbit		 1.5GB No 1x
2x
4x		 100 (x2)
133 (x2)		 Asynch N/A
NVidia nForce220D
(Crush11)
[IGP-64]
[MCP-D]
GeForce2 MX		 K7
Duron		 SDRAM PC133
DDR PC2100
Asynch Mem		 6 64Mbit
128Mbit
256Mbit
512Mbit		 1.5GB No 1x
2x
4x		 100 (x2)
133 (x2)		 Asynch N/A
NVidia nForce420
(Crush12)
[IGP-128]
[MCP]
GeForce2 MX		 K7
Duron		 SDRAM DC PC133
DDR DC PC2100
Asynch Mem		 6 64Mbit
128Mbit
256Mbit
512Mbit		 1.5GB No 1x
2x
4x		 100 (x2)
133 (x2)		 Asynch N/A
NVidia nForce420D
(Crush12)
[IGP-128]
[MCP-D]
GeForce2 MX		 K7
Duron		 SDRAM DC PC133
DDR DC PC2100
Asynch Mem		 6 64Mbit
128Mbit
256Mbit
512Mbit		 1.5GB No 1x
2x
4x		 100 (x2)
133 (x2)		 Asynch N/A
NVidia nForce415D
(Crush12)
[IGP-128]
[MCP-D]		 K7
Duron		 SDRAM DC PC133
DDR DC PC2100
Asynch Mem		 6 64Mbit
128Mbit
256Mbit
512Mbit		 1.5GB No 1x
2x
4x		 100 (x2)
133 (x2)		 Asynch N/A
NVidia nForce620D
(Crush?)
[IGP-128/333]
[MCP-D]
GeForce2 MX		 K7
Duron		 SDRAM DC PC133
DDR DC PC2700
Asynch Mem		 6 64Mbit
128Mbit
256Mbit
512Mbit		 1.5GB No 1x
2x
4x		 100 (x2)
133 (x2)		 Asynch N/A
NVidia nForce615D
(Crush?)
[IGP-128/333]
[MCP-D]		 K7
Duron		 SDRAM DC PC133
DDR DC PC2700
Asynch Mem		 6 64Mbit
128Mbit
256Mbit
512Mbit		 1.5GB No 1x
2x
4x		 100 (x2)
133 (x2)		 Asynch N/A
NVidia nForce2-ST SPP
(Crush18)
[ ? ]
[MCP-T]		 K7
Duron		 DDR DC PC3200 6 ?Mbit 3GB ? 1x
2x
4x
8x		 100 (x2)
133 (x2)		 Asynch N/A
NVidia nForce2-GT IGP
(Crush18)
[ ? ]
[MCP-T]
GeForce4 MX		 K7
Duron		 DDR DC PC3200 6 ?Mbit 3GB ? 1x
2x
4x
8x		 100 (x2)
133 (x2)		 Asynch N/A
NVidia nForce230
(Crush11)
[IGP-64]
[MCP[2]]
GeForce2 MX		 K7
Duron		 SDRAM PC133
DDR PC2100
Asynch Mem		 6 64Mbit
128Mbit
256Mbit
512Mbit		 1.5GB No 1x
2x
4x		 100 (x2)
133 (x2)		 Asynch N/A
NVidia nForce230-T
(Crush11)
[IGP-64]
[MCP-T]
GeForce2 MX		 K7
Duron		 SDRAM PC133
DDR PC2100
Asynch Mem		 6 64Mbit
128Mbit
256Mbit
512Mbit		 1.5GB No 1x
2x
4x		 100 (x2)
133 (x2)		 Asynch N/A
NVidia nForce430
(Crush12)
[IGP-128]
[MCP[2]]
GeForce2 MX		 K7
Duron		 SDRAM DC PC133
DDR DC PC2100
Asynch Mem		 6 64Mbit
128Mbit
256Mbit
512Mbit		 1.5GB No 1x
2x
4x		 100 (x2)
133 (x2)		 Asynch N/A
NVidia nForce430-T
(Crush12)
[IGP-128]
[MCP-T]
GeForce2 MX		 K7
Duron		 SDRAM DC PC133
DDR DC PC2100
Asynch Mem		 6 64Mbit
128Mbit
256Mbit
512Mbit		 1.5GB No 1x
2x
4x		 100 (x2)
133 (x2)		 Asynch N/A
NVidia nForce2-S SPP
(Crush18)
[ ? ]
[MCP[2]]		 K7
Duron		 DDR DC PC3200 6 ?Mbit 3GB ? 1x
2x
4x
8x		 100 (x2)
133 (x2)
166 (x2)		 Asynch N/A
NVidia nForce2-G IGP
(Crush18)
[ ? ]
[MCP[2]]
GeForce4 MX		 K7
Duron		 DDR DC PC3200 6 ?Mbit 3GB ? 1x
2x
4x
8x		 100 (x2)
133 (x2)
166 (x2)		 Asynch N/A
NVidia nForce2 400
(Crush18)
[ ? ]
[MCP[2]]		 K7
Duron		 DDR PC3200 6 ?Mbit 3GB ? 1x
2x
4x
8x		 100 (x2)
133 (x2)
166 (x2)
200 (x2)		 Asynch N/A
NVidia nForce2 Ultra 400
(Crush18)
[ ? ]
[MCP-T]		 K7
Duron		 DDR PC3200 6 ?Mbit 3GB ? 1x
2x
4x
8x		 100 (x2)
133 (x2)
166 (x2)
200 (x2)		 Asynch N/A
SiS Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
SiS 730S
[730S]
SiS301 AGP		 K7
Duron		 SDRAM PC133
Asynch Mem		 6 16Mbit
64Mbit
128Mbit
256Mbit		 1.5GB No 1x
2x
4x		 100 (x2) PCI 2.2 N/A
SiS 733
[733]		 K7
Duron		 SDRAM PC133 6 16Mbit
64Mbit
128Mbit
256Mbit		 1.5GB No 1x
2x
4x		 100 (x2)
133 (x2)		 PCI 2.2 N/A
SiS 735
[735]		 K7
Duron		 SDRAM PC133
DDR PC2100
Mem=4/3 Bus		 6 16Mbit
64Mbit
128Mbit
256Mbit		 1.5GB No 1x
2x
4x		 100 (x2)
133 (x2)		 PCI 2.2 N/A
SiS 745
[745]		 K7
Duron		 SDRAM PC133
DDR PC2700
Mem=4/3 Bus		 6 16Mbit
64Mbit
128Mbit
256Mbit
512Mbit		 3GB No 1x
2x
4x		 100 (x2)
133 (x2)		 ? N/A
SiS 746
[746]
[963]		 K7
Duron		 SDRAM PC133
DDR PC2700		 6 16Mbit
64Mbit
128Mbit
256Mbit		 ?GB No 4x
8x
1.5v		 100 (x2)
133 (x2)		 1/3
1/4
PCI 2.2		 N/A
SiS 746FX
[746FX]
[963L]		 K7
Duron		 SDRAM PC133
DDR PC3200		 6 16Mbit
64Mbit
128Mbit
256Mbit		 3GB No 4x
8x
1.5v		 100 (x2)
133 (x2)
166 (x2)		 1/3
1/4
1/5
PCI 2.2		 N/A
SiS 748
[748]
[963L]		 K7
Duron		 SDRAM PC133
DDR PC3200		 6 16Mbit
64Mbit
128Mbit
256Mbit		 3GB No 4x
8x
1.5v		 100 (x2)
133 (x2)
166 (x2)
200 (x2)		 1/3
1/4
1/5
1/6
PCI 2.2		 N/A
SiS 746DX
[746DX]
[963]		 K7
Duron		 SDRAM PC133
DDR PC3200		 6 16Mbit
64Mbit
128Mbit
256Mbit		 ?GB No 1x
2x
4x
8x		 100 (x2)
133 (x2)		 1/3
1/4
PCI 2.2		 N/A
SiS 740
[740]
[961]
SiS 315 AGP		 K7
Duron		 SDRAM PC133
DDR PC2100		 6 16Mbit
64Mbit
128Mbit
256Mbit		 1.5GB No 1x
2x
4x		 100 (x2)
133 (x2)		 1/3
1/4
PCI 2.2		 N/A
SiS 750
[750]
[961]
SiS 330 AGP		 K7
Duron		 SDRAM PC133
DDR PC?		 ? ?Mbit 1.5GB ? 1x
2x
4x		 100 (x2)
133 (x2)		 1/3
1/4
PCI 2.2		 N/A
SiS 741
[741]
[964]
SiS 301B AGP		 K7
Duron		 SDRAM PC133
DDR PC2100		 6 16Mbit
64Mbit
128Mbit
256Mbit		 1.5GB No 4x
8x
1.5v		 100 (x2)
133 (x2)
166 (x2)
200 (x2)		 1/3
1/4
1/5
1/6
PCI 2.2		 N/A
VIA Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
VIA KX-133
[VT8371]
[VT82C686A]		 K7 EDO
SDRAM PC133
ESDRAM
VC SDRAM
Mem=4/3 Bus		 6 16Mbit
64Mbit
128Mbit
256Mbit		 2GB Both 1x
2x
4x		 100 (x2) 1/3
Pseudosynch
PCI 2.2		 N/A
VIA KT-133
[VT8363]
[VT82C686A]		 K7
Duron		 SDRAM PC133
ESDRAM
VC SDRAM
Mem=4/3 Bus		 6 16Mbit
64Mbit
128Mbit
256Mbit		 1.5GB No 1x
2x
4x		 100 (x2) 1/3
Pseudosynch
PCI 2.2		 N/A
VIA KM-133
(VS2-K7)
[VT8365]
[VT8231]
Savage4 AGP		 K7
Duron		 FPM
EDO
SDRAM PC133
VC SDRAM		 6 16Mbit
64Mbit
128Mbit
256Mbit		 1.5GB No 1x
2x
4x		 100 (x2) 1/3
Pseudosynch
PCI 2.2		 N/A
VIA KT-133E
[VT8363E]
[VT82C686B]		 K7
Duron		 SDRAM PC133
ESDRAM
VC SDRAM
Mem=4/3 Bus		 6 16Mbit
64Mbit
128Mbit
256Mbit		 1.5GB No 1x
2x
4x		 100 (x2) 1/3
Pseudosynch
PCI 2.2		 N/A
VIA KT-133A
[VT8363A]
[VT82C686A]		 K7
Duron		 SDRAM PC133
ESDRAM
VC SDRAM
Mem=4/3 Bus		 6 16Mbit
64Mbit
128Mbit
256Mbit		 1.5GB No 1x
2x
4x		 100 (x2)
133 (x2)		 1/3
1/4
Pseudosynch
PCI 2.2		 N/A
VIA KT-266
[VT8366]
[VT8233]		 K7
Duron		 SDRAM PC133
Reg SDRAM
VC SDRAM
DDR PC2100
Reg DDR
Mem=3/4 Bus
Mem=4/3 Bus
Mem=AGP		 6 S
8 Reg		 64Mbit
128Mbit
256Mbit
512Mbit		 3GB S
4GB Reg		 Both 1x
2x
4x		 100 (x2)
133 (x2)		 1/3
1/4
Pseudosynch
PCI 2.2		 N/A
VIA KLE133
[VT8361]
[VT82C686B]
Trident Blade 3D		 K7
Duron		 SDRAM PC133
VC SDRAM		 ? ?Mbit 2GB ? 1x
2x
4x		 100 (x2)
133 (x2)		 1/3
1/4
Pseudosynch
PCI 2.2		 N/A
VIA KL-133
[VT8364]
[VT82C686B]
Savage4 AGP		 K7
Duron		 SDRAM PC133
VC SDRAM		 ? 16Mbit
64Mbit
128Mbit
256Mbit		 1GB ? 1x
2x
4x		 100 (x2) 1/3
Pseudosynch
PCI 2.2		 N/A
VIA KL-133A
[VT8364A]
[VT82C686B]
Savage4 AGP		 K7
Duron		 SDRAM PC133
VC SDRAM		 ? 16Mbit
64Mbit
128Mbit
256Mbit		 1GB ? 1x
2x
4x		 100 (x2)
133 (x2)		 1/3
1/4
Pseudosynch
PCI 2.2		 N/A
VIA KM-133A
(VS2-K7)
[VT8365A]
[VT8231]
Savage4 AGP		 K7
Duron		 FPM
EDO
SDRAM PC133
VC SDRAM		 6 16Mbit
64Mbit
128Mbit
256Mbit		 1.5GB No 1x
2x
4x		 100 (x2)
133 (x2)		 1/3
1/4
Pseudosynch
PCI 2.2		 N/A
VIA KT-266A
[VT8366A]
[VT8233]		 K7
Duron		 SDRAM PC133
Reg SDRAM
DDR PC2100
Reg DDR
Mem=3/4 Bus
Mem=4/3 Bus
Mem=AGP		 6 S
8 Reg		 64Mbit
128Mbit
256Mbit
512Mbit		 3GB S
4GB Reg		 Both 1x
2x
4x		 100 (x2)
133 (x2)		 1/3
1/4
1/5
Pseudosynch
PCI 2.2		 N/A
VIA KT-266DP
[ ? ]
[VT8233A]		 Athlon MP Dual SDRAM PC133
Reg SDRAM
DDR PC2100
Reg DDR		 6 S
8 Reg		 64Mbit
128Mbit
256Mbit
512Mbit		 3GB S
4GB Reg		 ECC 1x
2x
4x		 100 (x2)
133 (x2)		 1/3
1/4
Pseudosynch
PCI 2.2		 N/A
VIA KM-266
(VS12-K7)
[VT8375]
[VT8233A]
Savage8 AGP		 K7
Duron		 SDRAM PC133
Reg SDRAM
VC SDRAM
DDR PC2100
Reg DDR		 6 S
8 Reg		 64Mbit
128Mbit
256Mbit
512Mbit		 3GB S
4GB Reg		 ECC 1x
2x
4x		 100 (x2)
133 (x2)		 1/3
1/4
Pseudosynch
PCI 2.2		 N/A
VIA KT-333
[VT8367]
[VT8233A]		 K7
Duron		 SDRAM PC133
Reg SDRAM
VC SDRAM
DDR PC2700
Reg DDR		 6 S
8 Reg		 64Mbit
128Mbit
256Mbit
512Mbit		 3GB S
4GB Reg		 ECC 1x
2x
4x		 100 (x2)
133 (x2)		 1/3
1/4
1/5
Pseudosynch
PCI 2.2		 N/A
VIA KT-333A
[VT8367]
[VT8235]		 K7
Duron		 SDRAM PC133
Reg SDRAM
DDR PC2700
Reg DDR		 ? 64Mbit
128Mbit
256Mbit
512Mbit		 4GB ECC 1x
2x
4x
8x		 100 (x2)
133 (x2)		 1/3
1/4
1/5
Pseudosynch
PCI 2.2		 N/A
VIA KT-400
[VT8368]
[VT8235]		 K7
Duron		 DDR PC3200 ? 64Mbit
128Mbit
256Mbit
512Mbit		 4GB ? 1x
2x
4x
8x		 100 (x2)
133 (x2)		 1/3
1/4
1/5
Pseudosynch
PCI 2.2		 N/A
VIA KT-400A
[VT8377A]
[VT8235]		 K7
Duron		 DDR PC3200 ? 64Mbit
128Mbit
256Mbit
512Mbit		 4GB ? 1x
2x
4x
8x		 100 (x2)
133 (x2)
166 (x2)		 1/3
1/4
1/5
Pseudosynch
PCI 2.2		 N/A
VIA KM-333
[ ? ]
[VT8235]
Zoetrope AGP		 K7
Duron		 SDRAM PC133
Reg SDRAM
DDR PC2700
Reg DDR		 ? ?Mbit ?GB ECC 1x
2x
4x
8x		 100 (x2)
133 (x2)		 1/3
1/4
Pseudosynch
PCI 2.2		 N/A
VIA KM-400
[VT8378]
[VT8235]
UniChrome AGP		 K7
Duron		 DDR PC3200 ? ?Mbit ?GB ? 1x
2x
4x
8x		 100 (x2)
133 (x2)
166 (x2)		 1/3
1/4
1/5
Pseudosynch
PCI 2.2		 N/A
VIA KT-600
[ ? ]
[VT8237]		 K7
Duron		 DDR PC3200 ? ?Mbit 4GB ? 1x
2x
4x
8x		 100 (x2)
133 (x2)
166 (x2)
200 (x2)		 1/3
1/4
1/5
1/6
Pseudosynch
PCI 2.2		 N/A
Goto Top of Page..
Itanium Chipsets
IBM Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
IBM Summit
[ ? ]
[ ? ]		 P7 16-way DDR PC? ? ?Mbit ?GB Chipkill ? 100 (x4) 1/3
PCI-X		 N/A
Intel Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
Intel 460GX
[82461GX] (SAC)
[82462GX] (SDC)
[82463GX] (MAC)
[82464GX] (MDC)
[82465GX] (GXB)
[82466GX] (WXB)
[82467GX] (PXB)
[82468GX] (IFB)
[82802AC] (FWH)
[82094AA] (PID)		 P7 Quad SDRAM PC100
4-way Interleave		 ? 16Mbit
64Mbit
128Mbit
256Mbit		 64GB ECC
Parity
MCA		 1x
2x
4x		 133 (x2) 1/4
PCI-66/64
PCI 2.2		 N/A
Intel E8870
[ ? ] (SNC)
[ ? ] (MRH-D)
[ ? ] (SIOH)
[ ? ] (ICH)
[ ? ] (P64H2)
[ ? ] (VXB)
[ ? ] (FWH)		 P7 Quad DDR QC PC1600
4-way Interleave		 ? 512Mbit
1Gbit		 128GB ECC
Parity
MCA		 1x
2x
4x		 100 (x4) 1/3
PCI-X		 N/A
Goto Top of Page..
Athlon 64/Opteron Chipsets
ALi Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
ALi M1687
[M1687]
[M1563]		 Athlon 64
Opteron		 Integrated into CPU -- -- -- -- 1x
2x
4x
8x
1.5v		 200 (x2) ? N/A
ALi M1688
[M1688]
[M1563]
? AGP		 Athlon 64
Opteron		 Integrated into CPU -- -- -- -- 1x
2x
4x
8x		 200 (x2) ? N/A
AMD Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
AMD 8000
(Golem)
[8111] (I/O)
[8131] (PCI)
[8151] (AGP)		 Athlon 64
Opteron		 Integrated into CPU -- -- -- -- N/A 200 (x2) PCI-X
PCI 2.2		 N/A
AMD ???
(Lokar)
[ ? ]
[ ? ]
[8151] (AGP)
? AGP		 Athlon 64
Opteron		 Integrated into CPU -- -- -- -- 1x
2x
4x
8x		 200 (x2) PCI 2.2 N/A
ATI Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
ATI ???
(RS-380)
[IGP ?]
[IXP SB380]
Radeon 9100 AGP		 Hammer Integrated into CPU -- -- -- -- 1x
2x
4x
8x		 200 (x2) ? N/A
ATI ???
(RX-380)
[IGP ?]
[IXP SB380]		 Hammer Integrated into CPU -- -- -- -- 1x
2x
4x
8x		 200 (x2) ? N/A
NVidia Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
NVidia nForce3
[ ? ]		 Athlon 64
Athlon 64 FX		 Integrated into CPU -- -- -- -- 1x
2x
4x
8x
0.8v
1.5v		 200 (x2) PCI 2.3 N/A
NVidia ?
(CK8)
[ ? ]
[ ? ]
GeForce4 MX		 Athlon 64
Athlon 64 FX		 Integrated into CPU -- -- -- -- 1x
2x
4x
8x		 200 (x2) PCI 2.3 N/A
NVidia nForce3 Pro 150
[ ? ]		 Opteron Integrated into CPU -- -- -- -- 1x
2x
4x
8x
0.8v
1.5v		 200 (x2) PCI 2.3 N/A
NVidia nForce3 Pro 250
[ ? ]		 Opteron Integrated into CPU -- -- -- -- 1x
2x
4x
8x
0.8v
1.5v		 200 (x2) PCI 2.3 N/A
SiS Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
SiS 755
[755]
[964]		 Athlon 64
Athlon 64 FX
Opteron		 Integrated into CPU -- -- -- -- 4x
8x
1.5v		 200 (x2) PCI ? N/A
SiS 760
[760]
[964]
SiS 301C AGP		 Athlon 64
Athlon 64 FX
Opteron		 Integrated into CPU -- -- -- -- 4x
8x
1.5v		 200 (x2) PCI ? N/A
VIA Chipsets Typical
CPUs		 DRAM
Types		 Mem
Rows		 DRAM
Density		 Max
Mem		 ECC/
Parity		 AGP Bus
Speeds		 PCI Clock
Dividers		 Max L2/
Tag bits
VIA K8T-800
[ ? ]
[VT8237]
[ ? ] VPX2		 Athlon 64
Athlon 64 FX
Opteron Dual		 Integrated into CPU -- -- -- -- 1x
2x
4x
8x		 200 (x2) PCI-66/64 N/A
VIA K8M-800
[ ? ]
[VT8237]
Unichrome2 AGP		 Athlon 64
Athlon 64 FX
Opteron		 Integrated into CPU -- -- -- -- 1x
2x
4x
8x		 200 (x2) PCI-66/64 N/A
Goto Top of Page..

Abbreviations:

  • K7 - AMD Athlon
  • P5 - Original Pentium (60/66)
  • P54C - Pentium Classic (75~200)
  • P55C - Pentium MMX (split voltage)
  • P6 - Pentium Pro
  • P6T - Pentium Pro OverDrive
  • P-III(T) - Tualatin Pentium III (different bus voltage than older P-IIIs. Chip is incompatible with older chipsets.)
  • P-III-S - 512KB Pentium III Tualatin (different electricals than P-III(T). Not intended to be used in desktop chipsets.)
  • P7 - Itanium (Merced)
  • Xeon - Larger cache versions of the Pentium II, Pentium III, or Pentium 4

  • FPM - Fast Page Mode
  • EDO - Extended Data Out (aka Hyper Page mode)
  • BEDO - Burst Extended Data Out
  • SDRAM - Synchronous DRAM (unbuffered)
  • Reg SDRAM - Registered SDRAM DIMM
  • SLDRAM - SyncLink DRAM
  • ESDRAM - Enhanced SDRAM
  • DDR PC2100 - PC2100 Double Data Rate SDRAM (unbuffered)
  • Reg DDR - Registered Double Data Rate SDRAM
  • RDR PC800 - PC800 Direct Rambus DRAM
  • RDR 4i - 4-bank Direct Rambus DRAM
  • RDR 32 - 32-bit Direct Rambus RIMM module (two 16-bit channels on a single RIMM module)
  • VC SDRAM - Virtual Channel SDRAM
  • HSDRAM - High speed SDRAM (lower latency and lower tAC PC133 SDRAM that runs up to ~150MHz). This isn't a different memory technology; it's souped-up PC133 SDRAM.
  • Single SIMM - Board supports a single 72-pin SIMM as one memory bank
  • Mem=3/4 Bus - Can run the RAM at 3/4 the speed of the System Bus
  • Mem=AGP - Can run the RAM at the speed of the AGP bus
  • DC - Dual Channel
  • QC - Quad Channel

  • Lin Burst - Cyrix 6x86/6x86L/6x86MX/M-II Linear Burst feature

  • PCI 2.2 - Complies with PCI spec rev. 2.2.
  • PCI 66/64 - Supports a 66MHz or 64-bit or both PCI bus (which varies from chipset to chipset). Chipsets often implement this feature with add-on modules, not as a standard feature.
  • Unless otherwise noted, assume PCI 2.1 compliance.

  • AGP - Accelerated Graphics Port
    • 0.8v and/or 1.5v - AGP buffers only operate at 0.8v or 1.5v levels; they are NOT 3.3v safe. This excludes some older AGP cards (like the 3dfx Voodoo series, Matrox G200, and Intel i740-based cards) from use in motherboards with this chipset. Quick rule of thumb: if your card supports AGP 4x mode, it should fit and operate in a 1.5v AGP slot.
  • SMA - Shared Memory Architecture (a bit different from UMA; basically an integrated AGP implementation)
  • UMA - Unified Memory Architecture (shared memory)


Notes:

  • The ECC/Parity column refers to whether or not the chipset supports error detection and correction for the system RAM. It doesn't indicate whether any onboard L2 has error detection. Also, any ECC function for the L2 cache on various sixth generation chips is handled exclusively by the CPU itself; the chipset doesn't deal with this. A 'Yes' in this column indicates there is some sort of error detection, but I'm not sure what flavor.
  • Many chipset features (such as the maximum amount of L2 cache or pseudo-synchronous operation) are not always implemented in all motherboards. Simply because a chipset supports a particular feature doesn't mean your motherboard necessarily has that feature.
  • The only bus speeds listed with each chipset are those that it officially supports. The Athlon, Willamette, Foster, and Merced chipsets all use a dual (2x) or quad-pumped (4x) bus that hits on the rising and falling edges of the clock, yielding a faster effective bus speed.
  • Running chipsets at odd bus speeds (75, 83, 112, 124MHz) can be hazardous to your system's overall stability. Most chipsets can only run PCI/AGP components as well as IDE channels synchronously, which forces the various buses to run outside their specifications when running at 75/83/112/124MHz. You won't physically damage the components by running them like this, but it can cause a system to behave erratically or even corrupt the occasional hard drive partition. Use with caution.
  • Although this page doesn't deal with 486 chipsets, beware of fake cache chips on 486 motherboards. Cache Check 7 can be helpful in determining what you have. Any chips with 'Write-Back' written on them are likely fake; write-back is a mode, not a type of SRAM chip.
  • The only difference between the Aladdin IV and the Aladdin IV+ is the chipset Southbridge.
  • Concerning the ALi Aladdin IV, IV+, V, and V+ chipsets:
    • The Aladdin IV and V chipsets may or may not be able to run in write-through mode. Personally, I don't think they can, but I really don't know. I'm assuming only write-back mode in the following paragraphs.
    • With 256KB of L2 present, the Aladdin IV and IV+ chipsets can use the 8Kx2 MESI cache line status bits for its modified and invalid bits, yielding 512MB cacheable with an 11-bit Tag. With 512KB of L2 cache present, the chipset can use the MESI bits if they are rearranged into 16Kx1 and one Tag bit is stolen for use as the invalid bit (like the Intel 430HX chipset does for its 512KB L2 cache), yielding 512MB cacheable with an 11-bit (effectively 10-bit) Tag. With 1MB of L2, the MESI probably can't be used at all, so two bits would need to be stolen from the TagRAM (leaving only 9 bits for address mapping), yielding 512MB cacheable in write-back mode. So, based on these assumptions:
      • ddin IV, IV+
        L2 Cacheable Range
        L2 Size 8-bit Tag 11-bit Tag Assumptions
        256KB WB 128M 512M Using 8Kx2 MESI.
        512KB WB 128M 512M Using 16Kx1 MESI. One Tag bit stolen for invalid bit.
        1MB WB 128M 512M No MESI. Two Tag bits stolen for invalid and modified bits.


  • The original Aladdin V chipset is interesting because its TagRAM is broken. If it were functioning, it would use a 16Kx10 SRAM for Tag store and 16Kx2 for MESI. With 256KB of L2, it supposedly can cache 1GB of RAM; but I have no idea how this works (you would need a 12-bit TagRAM along with the MESI bits). With 512KB, it can cache 512MB. For 1MB of L2, you would have to rearrange the MESI bits to 32Kx1 and steal an invalid bit from the Tag, yielding 512MB cacheable.
That's how it's supposed to work, but since it's broken, all revisions up through Revision 'E' of the Aladdin V chipset can only cache up to 128MB in write-back mode using an external 8-bit TagRAM with 512KB of L2 cache. The chipset uses its pair of MESI bits for the dirty and invalid bits.
  • Aladdin V, V+ (broken)
    L2 Cacheable Range
    L2 Size Cacheable Assumptions
    256KB WB 64M Disable internal TAG. Use internal 8Kx2 MESI and external 8Kx8 TAG. Yields 8 Tag bits.
    256KB WB 256M Disable internal TAG. Use internal 8Kx2 MESI and external 8Kx10 TAG (or two 8Kx8 chips, using only the first two Tag bits of the second chip) leaving 10 bits for Tag.
    512KB WB 128M Disable internal TAG. Use internal 16Kx2 MESI and external 16Kx8 TAG. Yields 8 Tag bits.
    512KB WB 512M Disable internal TAG. Use internal 16Kx2 MESI and external 16Kx10 TAG (or two 16Kx8 chips, using only the first two Tag bits of the second chip) leaving 10 bits for Tag.
    1MB WB 128M Disable internal TAG. 32Kx1 internal MESI used as dirty bit. One bit [7] is stolen from external 32Kx8 Tag chip for invalid bit, leaving 7 bits for Tag.
    1MB WB 512M Disable internal TAG. 32Kx1 internal MESI used as dirty bit. One bit [9] is stolen from external 32Kx10 Tag chip (or two 32Kx8 chips, using only the first two Tag bits of the second chip) for invalid bit, leaving 9 bits for Tag.


  • Revision 'F' and later of the Aladdin V (M1542) fixes the internal Tag and can cache up to 512MB with either a 512KB or 1MB L2 and supposedly 1GB with 256KB.
    • Aladdin V+ (fixed)
      L2 Cacheable Range
      L2 Size Cacheable Assumptions
      256KB WB 256M Disable external TAGs. Use internal 8Kx2 MESI and internal 8Kx10 TAG. Yields 10 Tag bits.
      256KB WB 1GB Use internal 8Kx2 MESI. Use internal 8Kx10 TAG [9:0] and first two bits from extended external TAG for Tag bits. Yields 12 Tag bits.
      512KB WB 128M Disable internal TAG. Use internal 16Kx2 MESI and external 16Kx8 TAG. Yields 8 Tag bits.
      512KB WB 512M Disable external TAGs. Use internal 16Kx2 MESI and internal 16Kx10 TAG. Yields 10 Tag bits.
      1MB WB 128M Disable internal TAG. Use internal 32Kx1 MESI for dirty bit. Use one external 32Kx8 chip as Tag. Steal one Tag bit from external TAG (bit [7]) for invalid bit. Yields 7 Tag bits.
      1MB WB 512M Disable internal TAG. Use internal 32Kx1 MESI for dirty bit. Use both external 32Kx8 chips (or one 32Kx10) as Tag. Steal one Tag bit from extended external TAG (bit [9]) for invalid bit. Yields 9 Tag bits.
      1MB WB 4GB Disable extended external 32Kx8 TAG (second external chip). Use 32Kx1 internal MESI and one internal Tag (bit [4]) for invalid and dirty bits. Use four bits from internal 32Kx10 TAG [3:0], and eight bits from external 32Kx8 TAG for Tag bits. Yields 12 Tag bits.


  • The Aladdin V+ adds an official 100MHz bus speed over the Aladdin V.
  • When run at 100MHz, only 6 SDRAM rows can be used in the Aladdin V+. Also, ECC does not function above 83MHz.
  • The AMD 640 chipset has various cacheing configurations. It can use the first seven Tag bits [6:0] of its 8-bit Tag as TagRAM with TA[7] acting as a modified bit in write-back mode. Or all 8 Tag bits can be used for addressability, each acting as its own modified line (this doubles the cacheable range in write-back mode, but is slower than if one bit were used exclusively as the modified (dirty) bit). This 8-bit scheme is the default setting for the chipset. A 9th Tag bit can be used with a single exclusive modified bit for cacheing up to 998MB in WT mode or 510MB in WB. And a 10th Tag bit is also available for cacheing up to 1998MB but, like the 8-bit Tag configuration, all Tags act as their own modified bits. The cacheable region is defined by the size of the L2 cache and which TagRAM scheme is used minus the size of the cache itself (no explanation is given in the datasheets, but because the 640 is based on a VIA chipset (the VP2/97), I believe it's the same as the VIA MVP3/MVP4 Invalid bit doohickey listed below). Of course since the chipset can only address 768MB of RAM, some of these cacheable limits are simply theoretical.
    • AMD 640
      L2 Cacheable Range
      L2 Size 8-bit Tag
      1 modified      		 8-bit Tag
      All modified      		 9-bit Tag
      1 modified      		 10-bit Tag
      All modified
      512KB WT 127.5M 127.5M 255.5M 511.5M
      WB 63.5M 127.5M 127.5M 511.5M
      1MB WT 255M 255M 511M 1023M
      WB 127M 255M 255M 1023M
      2MB WT 510M 510M 1022M 2046M
      WB 254M 510M 510M 2046M
  • The Shuttle HOT-603 (the only motherboard that shipped with the 640 chipset), uses the 8-bit Tag w/ 1 modified scheme for its 1MB L2, yielding 255MB cacheable in WT mode and 127MB in WB.
  • AFAIK, the AMD 640AGP chipset was never released.
  • The AMD Athlon processor was initially demoed with the 751/755 chipset, but the 751 (Irongate) northbridge was actually released accompanied by the 756 (Viper) southbridge instead. This chipset pair was given the name 750.
  • The AMD 750 chipset may come bundled with the VIA VT82C686A southbridge rather than the default AMD 756 southbridge.
  • The AMD 760 chipset only runs its memory synchronously with the FSB, so to fully utilize PC2100 (266MHz) DDR-SDRAM, a 133MHz-based CPU must be used. If the FSB is set to run at 100MHz rather than 133MHz, "PC2100" DDR SDRAM will run at 200MHz effective (same as PC1600 DDR).
  • The AMD 760 chipset can come with either the AMD 766 southbridge or the VIA 686B southbridge. But in reality the 760 can only be found with the VIA 686B southbridge on available motherboards.
  • The AMD 760MP chipset can only utilize PCI-66 when using a PCI-66 compatible southbridge (this excludes the AMD 766 southbridge).
  • The AMD 762MP northbridge has specific incompatibilities with the VIA VT82C686B southbridge when write-snooping and when using ACPI suspend mode with Registered DIMMs. Note that the 762MP northbridge does not support unbuffered DIMMs; only Registered memory is supported.
  • The ATI S1-370 TL chipset may come with the ALi 1635D or 1543 southbridge.
  • The ATI IGP 320 chipset may come with the IXP 200 or the VIA VT82C686B southbridge.
  • The ATI IXP250 adds wake-on-LAN and DMI functionality over the IXP200.
  • The Intel 430LX has 9 Tag bits available (bits [27:19]) when 512KB of L2 cache is present and 10 Tag bits (bits [27:18]) when 256KB of cache is used. So both 256KB and 512KB L2 sizes cache the same amount of memory.
  • The Intel 430NX, 430FX, 430VX, 430HX, and 430TX chipsets do not support write-through mode for the L2 cache.
  • The Intel 430HX chipset uses one 8-bit wide TagRAM chip (bits [7:0]) for cacheing the bottom 64MB of system memory in write-back mode. When a second 8-bit wide TagRAM chip is installed into the second socket, the chipset can use the extended Tag addresses to cache up to 512MB of RAM in write-back mode. The extra 8-bit TagRAM only adds 3 Tag bits [10:8] to the addressable cache range. The 430HX can only address 512MB of memory anyway, so more Tag bits aren't needed.
  • The 430HX can support 0KB, 256KB, and 512KB of L2 cache. In the 256KB configuration, an external 8Kx8 SRAM is used along with the internal 8Kx2 MESI to cache up to 64MB. With 512KB present, a 16Kx8 external SRAM is used and the internal MESI is changed into a 16Kx1 configuration. You lose one bit (the invalid bit) from the MESI, so one bit from the Tag bits must be stolen for use as the invalid bit. Because it loses a Tag bit, this results in the 512KB L2 having the same cacheable range (64MB) as the 256KB configuration. If you were using the Extended 11-bit Tag mentioned above, then cacheable range for both L2 sizes would be 512MB instead of 64MB. This same cache 'twizzle' also appears to be implemented on the 430FX, 430VX, and 430TX chipsets (each mention that with 512KB, the external SRAM contains the Tag and valid bits).
  • Because the Intel 430VX chipset was one of the first to support SDRAM, many motherboards based on this chipset only support 2-clock SDRAM DIMMs (this also applies to some early 430TX boards). There are both 2-clock and 4-clock SDRAMs. The 'clock' determines the number of DRAM chips accessed each cycle. Contact your mobo manufacturer to determine which kind your motherboard supports. Although 4-clock SDRAM might work in a 2-clock board and, likewise, 2-clock SDRAM might work in a 4-clock mobo, the only way to tell is to try it. Most PC-66 SDRAM produced is of the 4-clock variety. All PC-100 and PC-133 SDRAM is 4-clock. Don't be surprised if it doesn't work in your motherboard. Another hang-up concerning the 430VX (as well as 430FX) chipset is the fact that it only supports 16Mbit DRAM densities. All SDRAM currently being produced is 64-Mbit or higher.
  • 128Mbit DRAM is supported by the C-1 (and later) steppings of the 440BX chipset in certain configurations (16Mx8 organization). Documented support for Enhanced SDRAM in the 440BX was added in the Spec Update.
  • The 1/4 PCI clock divider on the Intel 440BX and 440ZX chipsets exists, but it's unofficial. But there is no 1/2 divider for AGP, so 133MHz may be quite iffy with an AGP video card. Not to mention that anything over 100MHz is overclocking anyway.
  • The Intel 810, 810e, 820, and 840 chipsets can *only* run its SDRAM system memory at 100MHz; therefore PC-100 (or faster) SDRAM is required even though the system bus itself actually can run at 66, 100, or 133MHz (depending on the chipset). Strange, but true. The i815 is the first Intel chipset to support PC133 SDRAM.
  • The Intel 810L chipset comes with I/O Control Hub 82801AB (ICH0). ICH0 supports ATA-33 and 4 PCI busmasters.
  • The Intel 810 chipset comes with I/O Control Hub 82801AA (ICH). ICH supports ATA-66 and 6 PCI busmasters.
  • The i810e and the DC100 version of the i810 chipset support 4MB of display cache for Z-buffer and come with the ICH controller hub, not ICH0.
  • The Intel 810 chipset has an erratum that prevents the SIMD instructions on the Pentium III chip from functioning; this was fixed with the 810E version of the chipset.
  • The ??? stepping of the 810e and 810e2 chipsets support the Pentium III Tualatin processor. The older ??? stepping does not.
  • The Intel 82802 FirmWare Hub comes as either a 4Mbit flash memory FWH (82802AB) or an 8Mbit flash memory FWH (82802AC).
  • The Intel 820 chipset supports D-RDRAM technologies in densities as high as 256Mbit, but SDRAM (via the MTH) is limited to 128Mbit. To achieve 1GB of memory with SDRAM on the i820, Registered SDRAM must be used. Note that SDRAM support has been removed from the 820 chipset because of reliability concerns.
  • The Intel i815e and i815ep differ from the i815 and i815p by what controller hub they use. The 'e' chipsets use ICH2 and the non-'e' chipsets use the older ICH.
  • The i815p and i815ep chipsets do not have onboard graphics controller.
  • The i815g and i815eg chipsets only have the onboard graphics controller and do not have an AGP slot.
  • The Intel 815 chipsets can support 3 double-sided DIMMs when running the RAM at 100MHz, but only 2 double-sided DIMMs when running it at 133MHz. In order to run the system memory at 133MHz, the front side bus must run at 133MHz. Conversely, you *can* run system memory at 100MHz with the FSB at 133MHz. Also, memory can be run at 100MHz (but not 133MHz) when using a 66MHz FSB.
  • The B-0 stepping of the 815, 815e, 815p, and 815ep chipsets support the Pentium III Tualatin processor. The older A-2 stepping does not.
  • The Intel ICH3 integrates the firmware hub.
  • The Intel 840 chipset comes with a choice of three optional components: P64H (64-bit PCI controller hub), MRH-R (Rambus memory repeater hubs that allow for more Rambus RIMMs on each channel), and MRH-S (SDRAM memory repeater hub to allow SDRAM to function on the motherboard). As much as 4GB of unbuffered SDRAM or 8GB of Registered SDRAM may be used on the i840. Note that the SDRAM memory repeater hub has been removed from the spec due to reliability problems.
  • The Intel 840 chipset can only support quad CPUs with a 100MHz bus; running quad CPUs on a 133MHz bus is not validated. Dual CPUs on a 133MHz bus is fine, however.
  • In October, 2002, official PC1066 RDRAM support was added to the 850E chipset.
  • The Intel 855 (Tulloch) chipset was originally billed in the press as being simply a cut-down version of the 850 Tehama, with a single Rambus channel and smaller memory capacity for use in lower-end systems. Later "reports" pegged it as a Tehama successor supporting 4i Rambus, 32-bit RIMMS, PC1066 RDR, and even 8x AGP. I'm honestly not sure which leaked specs are correct. And since it was cancelled, we may never really know.
  • The Intel 845G and 845GL are picky in what memory specs they support (single-sided/double-sided, etc.) See Intel's datasheets for more info.
  • The Intel 845GL and 845GV do not support an AGP slot.
  • The Intel 7205 chipset can only runs its memory synchronously with the FSB. Identical pairs must be used for Dual Channel operation.
  • The NVidia nForce chipsets differ by what AGP texturing (memory for graphics) configuration they use. Crush 11 uses a 64-bit SMA configuration, sharing main memory with the rest of the system. Crush 12 uses a dual channel DDR configuration (effectively 128-bit) with one channel (a separate dedicated DIMM) used for the onboard graphics memory. If an external AGP card is present the second memory channel can be utilized by the system instead. The same is true for the Crush 17 and 18 chipsets, respectively. Though it looks like Crush 17 got dropped from NVidia's lineup.
  • The nForce chipsets come both with and without a Dolby Digital 2.1 encoder (MCP-D comes with the encoder, MCP does not).
  • The nForce2 chipsets can come with either the more advanced MCP-T or a cut-down version, the MCP[2]. I've called it MCP[2] because it's a revised version of the MCP (with USB 2.0 and AC97). MCP[2] can also be combined with the older nForce northbridges (nForce 230 and 430) as can MCP-T (nForce 230-T and 430-T).
  • The nForce3 Pro 150 has a 16-bit downlink and 8-bit uplink for its Hypertransport link. The nForce3 Pro 250 has 16-bit links for both directions.
  • The OPTi Viper, Viper-N, Viper-N+, and ViperMax chipsets can either use Tag address 0 from the primary Tag chip for the dirty bit, leaving seven Tag bits (D[7:1]) for addressing (which halves the max cacheable in WB mode). Or use a 32Kx9 TagRAM chip, which includes a dedicated dirty bit (D[8]). Or use D[0] from a separate Tag chip as a dirty bit. The latter scheme disregards the seven other Tag bits (D[7:1]) on the secondary Tag chip. The Viper, Viper-N, Viper-N+, and ViperMax support up to 2MB of asynchronous cache or 512KB of synchronous cache.
  • The SiS 5571 originally was supposed to support up to 1MB of PB L2 cache, but the max is actually 512KB.
  • The SiS 5571, 5597/98, 5581/82, and 5591/92 chipsets have a separate internal dirty bit so the entire TagRAM can be used for address mapping in write-back mode.
  • The L2 cache on the SiS 5597/98, 5581/82, 5591/92, and 530 chipsets can only run in write-back mode (write-through can only be used for cache sizing).
  • The SiS 5597 differs from the SiS 5598 only in what form factor motherboard it is designed for. The SiS 5581/5582, SiS 5591/5592, VIA VP3 (597/597AT), and VIA MVP3 (598/598AT) also differ from each other only by what form factor board they are designed for.
  • The SiS 5591 chipset has a 100MHz bus, but only in the later revisions.
  • The SiS 530 and 620 chipsets may come with either the 5595 or 960 southbridge.
  • AFAIK, the SiS 621 chipset was never released. It was essentially replaced by the SiS 630.
  • The SiS 630S chipset differs from the 630E chipset in it allows for an AGP slot for video card upgrades; the 630E does not. And it supports VC SDRAM memory.
  • The SiS 645 and 650 chipsets support up to 3GB of PC2100 DDR SDRAM. When using the faster PC2700 (DDR 333) only 2 DIMMs can be used, limiting the chipset to 2GB max mem.
  • The SiS 646 chipset was renamed 645DX.
  • The SiS 648FX chipset supports up to three DDR-333 (PC2700) or two DDR-400 (PC3200) DIMMs.
  • The SiS 650GX is the same as the 650 chipset except it does not support an AGP slot.
  • The SiS 651 chipset can support a maximum of three PC2100 DDR DIMMs or two PC2700 DDR DIMMs.
  • The SiS 661FX chipset can support up to 3GB of PC2700 DDR or 2GB of PC3200 DDR.
  • The SiS 741 chipset supports an external AGP slot in addition to its internal video chipset. The SiS 740 chipset does not have the external slot.
  • The VIA VP, VP2, VP2/97, VPX, VPX/97, and VP3 all seem to use the same cacheing scheme as the AMD 640 mentioned above (including subtracting the size of the L2 from the top of cacheable RAM to get the true cacheable range). Therefore:
    • VIA VP, VP2, VP2/97, VPX, VPX/97, VP3
      L2 Cacheable Range
      L2 Size 8-bit Tag
      1 modified      		 8-bit Tag
      All modified      		 9-bit Tag
      1 modified      		 10-bit Tag
      All modified
      512KB WT 127.5M 127.5M 255.5M 511.5M
      WB 63.5M 127.5M 127.5M 511.5M
      1MB WT 255M 255M 511M 1023M
      WB 127M 255M 255M 1023M
      2MB WT 510M 510M 1022M 2046M
      WB 254M 510M 510M 2046M
  • BEDO support was removed from the VIA VP2 datasheet.

  • Any ECC capability was removed from the VIA VPX and VPX/97 chipsets.

  • Even though the VIA VP3 and Apollo Pro chipsets may claim to support DDR SDRAM, this support refers to an older specification of the memory type. These chipsets are not compatible with the current DDR spec.

  • Support for DDR-SDRAM, ESDRAM, and VC SDRAM was removed from the VIA MVP3 chipset specs.

  • Some motherboards may combine the VIA MVP3 northbridge with the 596A (or 596B) southbridge rather than the 586B southbridge.

  • The VIA MVP3 and MVP4 max out at 127.5MB cacheable when 512KB of L2 is present, 255MB cacheable with 1MB of L2, and 510MB cacheable with 2MB of L2 in write-through mode. The unusual cacheable ranges stem from the fact that the the top Tag address value (11111111, which would normally map an area the size of the L2 cache into RAM) is used as an invalid bit (there is no separate invalid bit within the chipset). Since this Tag address is lost, this area at the top of addressable RAM cannot be cached. So basically you figure out the cacheable RAM size according to the L2 size and 8-bit TagRAM and then subtract out the amount of L2 cache from the total cacheable area to get the actual cacheable amount. This also applies to write-back mode, but because one Tag bit is used as a dirty (modified) bit, the amount of cacheable RAM is half that of write-through, and then the L2 cache size is subtracted out to get the final cacheable range. See, this stuff is easy. ;-) Or in other words:
    • VIA MVP3, MVP4
      L2 Cacheable Range
      L2 Size 8-bit Tag
      512KB WT 127.5M
      WB 63.5M
      1MB WT 255M
      WB 127M
      2MB WT 510M
      WB 254M


  • The VIA Apollo Pro133 and Pro133A chipsets may come with either the 596B or 686A southbridge.

  • While 8 memory banks (2GB max) are technically supported on the VIA Pro133, it is recommended that only 6 banks (1.5GB max) be used.

  • When using PC133 SDRAM on the VIA Pro133A chipset, only 6 banks may be used. All 8 may be used with PC100 SDRAM.

  • The VIA ProMedia with integrated Trident AGP was renamed to PM601 and was then renamed again to PLE133. And the PM-133 (with S3 AGP) used to be called the ProMedia-II.

  • The VIA PM-133 chipset allows an AGP slot in addition to the integrated graphics; the PL-133 does not have the AGP slot.

  • I'm not exactly sure what the differences between the VIA P4X-266A and P4X-266E are.

  • The VIA PT-600 and PT-800 were originally named the P4X-600 and P4X-800.

  • The VIA KX-133 does not support the Thunderbird or later Athlons because of different bus signal types.

  • The VIA KZ-133 chipset was renamed to KT-133.

  • The VIA KT-133E chipset supports the PowerNow! Features of the mobile Athlon/Duron CPUs, though it can still be found in desktop systems.

  • The VIA KM-133 chipset allows an AGP slot in addition to the integrated graphics; the KL-133 does not have the AGP slot.

  • The VIA KT-266A comes with memory performance enhancements over that of the KT-266.

  • The VIA KT-333 may be paired with the VT8233 or (on some boards) the VT8235.

  • The VIA KT-400A may be paired with the VT8235 or the VT8237.

  • The VIA Apollo Pro-266T, P4X-266, and P4X-266A all may come with the optional PCI-66/64 VPX controller.

  • While many Athlon-compatible VIA chipsets may claim support for ECC memory, they may not actually utilize the ECC functionality beyond the booting stage.

  • The VIA K8T-400M used to be known as the K8HTB.

 

Renamed Chipsets:
PCChips HX Pro = ALi Aladdin III
PCChips SX Pro (M598) = SiS 530
PCChips TX AGP Pro (M577) = VIA MVP3
PCChips TX Pro (M560) = ALi Aladdin IV+
PCChips TX Pro (M575) = ALi Aladdin IV+
PCChips TX Pro II (M571) = SiS 5597/98
PCChips TX Pro III (M573) = VIA VP2
PCChips TX Pro IV (M570) = SiS 5591/92
PCChips Top Gun (M565) = ALi Aladdin IV+
PCChips VIA GRA (M858LMR) = VIA MVP4
PCChips VX Pro = VIA VP
PCChips VX Pro+ = VIA VPX
PCChips VX Two = SiS ???
PCChips M590 = SiS 530
PCChips BXToo (M760V) = VIA Apollo Pro
PCChips BXToo (M761V) = VIA Apollo Pro
PCChips BXToo (M767V) = VIA Apollo Pro+
PCChips BXPro (M747) = SiS 5600
PCChips BXCel (M726) = ALi Aladdin Pro II
PCChips BXCel (M729) = ALi Aladdin Pro II
PCChips BXTel (M730) = VIA Apollo Pro
PCChips Xcel 2000 (M741LMRT) = SiS 620
SOYO ETEQ 6618 = VIA VPX/97
SOYO ETEQ 6628 = VIA VP3
SOYO ETEQ 6638 = VIA MVP3

PC Chips actually goes by many names. PCChips = Ability = Alton = Amptron = Aristo = Asia Gate = Asiatech = Assa = Atrend = ECS = Elpina = Eurone = Fugu = Fugutech = Hi Sing = Houston = Hsing Tech = H Tech = Matsonic = Minstaple = PCWare = Pine = Protac = QDI = Warpspeed


South Bridge

ALi Southbridge North
Bridges		 Northbridge
Connection		 ATA
(UDMA)		 PCI USB Audio Other
M1533 Aladdin IV 133MB/s ATA-33
33MB/s		 PCI 1 host
2 ports
1.0a		 N/A
M1543 Aladdin IV+
Aladdin V
Aladdin V+
Aladdin Pro II		 133MB/s ATA-66
66MB/s		 PCI 1 host
3 ports
1.0a		 N/A
M1535D Aladdin TNT2
Aladdin Pro 4
ATI S1-370TL		 133MB/s ATA-66
66MB/s		 PCI 1 hosts
4 ports
1.0a		 AC97 2.1
M1535D+ Aladdin Pro 5
Aladdin Pro 5T		 133MB/s ATA-100
100MB/s		 PCI 2 hosts
6 ports
1.0a		 AC97 2.1
M1563 Aladdin M1667
M1681
M1683
M1687
M1688		 Hypertransport
800MB/s		 ATA-133
133MB/s		 PCI 4 hosts
6 ports
2.0		 AC97 2.1 10/100 Ethernet
AMD Southbridge North
Bridges		 Northbridge
Connection		 ATA
(UDMA)		 PCI USB Audio Other
756 751 133MB/s ATA-66
66MB/s		 PCI 1 host
4 ports
1.0		 N/A
766 760
760MP		 133MB/s ATA-100
100MB/s		 PCI 2.2
33MHz
5 devices		 1 host
4 ports
1.0		 N/A
768 760MPX 266MB/s ATA-100
100MB/s		 PCI-66/64
66MHz
PCI 2.2
33MHz
8 devices		 1 host
4 ports
1.1		 AC97
8111 8000 Hypertransport
800MB/s		 ATA-133
133MB/s		 PCI 2.2
33MHz
8 devices		 1 host
6 ports
2.0		 AC97 2.2 10/100 Ethernet
8131 PCI-X 8000 Hypertransport
6400MB/s		 N/A 2xPCI-X
133MHz
PCI 2.2
66MHz
5 devices
per bridge		 N/A N/A
8151 AGP 8000 Hypertransport
6400MB/s		 N/A N/A N/A N/A
ATI Southbridge North
Bridges		 Northbridge
Connection		 ATA
(UDMA)		 PCI USB Audio Other
IXP 200 IGP 320
IGP 330
IGP 340
Radeon 9100 IGP		 133MB/s ATA-100
100MB/s		 PCI ?
?MHz
? devices		 ? hosts
6 ports
2.0		 AC97 10/100 Ethernet
IXP 210 ? 133MB/s ATA-100
100MB/s		 PCI ?
?MHz
? devices		 ? hosts
6 ports
2.0		 AC97 10/100 Ethernet
IXP 250 Radeon 9100 IGP 133MB/s ATA-100
100MB/s		 PCI ?
?MHz
? devices		 ? hosts
6 ports
2.0		 AC97 10/100 Ethernet
IXP 300C ? ?MB/s Serial ATA 1
150MB/s		 PCI ?
?MHz
? devices		 ? hosts
6 ports
2.0		 AC? 10/100 Ethernet
IXP 380SB ? Hypertransport
?MB/s		 ATA ?
?MB/s		 PCI 2.3
?MHz
? devices		 ? hosts
6 ports
2.0		 AC? 10/100 Ethernet
Intel Southbridge North
Bridges		 Northbridge
Connection		 ATA
(UDMA)		 PCI USB Audio Other
82371SB (PIIX3) 430HX
430VX
440FX		 133MB/s PIO-4
16MB/s		 PCI 2.1 1 host
2 ports
1.0		 N/A
82371AB (PIIX4)
82371EB (PIIX4E)		 430TX
440BX
440EX
440LX
440ZX		 133MB/s ATA-33
33MB/s		 PCI 2.1
33MHz		 1 host
2 ports
1.0		 N/A
82801AA (ICH) 810
810-DC100
810e-DC133
815
815g
815p
820
840		 Hub
266MB/s		 ATA-66
66MB/s		 PCI 2.2
33MHz
6 devices		 1 host
2 ports
1.1		 AC97 2.1
82801AB (ICH0) 810L Hub
266MB/s		 ATA-33
33MB/s		 PCI 2.2
33MHz
4 devices		 1 host
2 ports
1.1		 AC97 2.1
82801BA (ICH2) 810e2-DC133
815e
815ep
820e
845
845B
850
850E
860		 Hub
266MB/s		 ATA-100
100MB/s		 PCI 2.2
33MHz
6 devices		 2 hosts
4 ports
1.1		 AC97 2.1
82801CA (ICH3) 830MG
830MP
E7500
E7501		 Hub
266MB/s		 ATA-100
100MB/s		 PCI 2.2
33MHz
6 devices		 3 hosts
6 ports
1.1		 AC97 2.2 10/100 Ethernet
82801DB (ICH4) 830MG
830MP
845E
845G
845GE
845GL
845PE
E7505		 Hub
266MB/s		 ATA-100
100MB/s		 PCI 2.2
33MHz
6 devices		 3 hosts
6 ports
2.0		 AC97 2.3 10/100 Ethernet
82801EB (ICH5) 865G
865P
865PE
875P		 Hub
266MB/s		 ATA-100
Serial ATA 1
150MB/s		 PCI 2.3
33MHz
6 devices		 4 hosts
8 ports
2.0		 AC97 2.3 10/100 Ethernet
802.3 LAN
82801EB (ICH5R) 865G
865P
865PE
875P		 Hub
266MB/s		 ATA-100
Serial ATA 1
150MB/s
Raid 0		 PCI 2.3
33MHz
6 devices		 4 hosts
8 ports
2.0		 AC97 2.3 10/100 Ethernet
802.3 LAN
? (ICH6) ? Hub Link 2
1066MB/s		 ATA-100
Serial ATA 1
150MB/s		 PCI Express 4 hosts
8 ports
2.0		 AC97 2.3 10/100 Ethernet
802.3 LAN
nVidia Southbridge North
Bridges		 Northbridge
Connection		 ATA
(UDMA)		 PCI USB Audio Other
MCP nForce220
nForce420		 Hypertransport
800MB/s		 ATA-100
100MB/s		 PCI 2.2
33MHz
6 devices		 2 hosts
6 ports
1.1		 N/A 10/100 Ethernet
MCP-D nForce220D
nForce420D
nForce420D
nForce615D
nForce620D		 Hypertransport
800MB/s		 ATA-100
100MB/s		 PCI 2.2
33MHz
6 devices		 2 hosts
6 ports
1.1		 DD2.1 APU 10/100 Ethernet
MCP-T nForce2-GT IGP
nForce2-ST SPP
nForce230-T
nForce430-T
nForce2 Ultra 400		 Hypertransport
800MB/s		 ATA-133
133MB/s		 PCI 2.2
33MHz
6 devices		 2 hosts
6 ports
2.0		 DD5.1 APU 10/100 Ethernet
IEEE 1394A
MCP[2] nForce230
nForce430
nForce615D
nForce620D
nForce2-G IGP
nForce2-S SPP
nForce2 400		 Hypertransport
800MB/s		 ATA-133
133MB/s		 PCI 2.2
33MHz
6 devices		 2 hosts
6 ports
2.0		 AC97 10/100 Ethernet
northbridge nForce3
nForce3 Pro 150		 Hypertransport
1200MB/s		 ATA-133
133MB/s
Serial ATA 1
150MB/s
Raid 0,1		 PCI 2.3
33MHz
6 devices		 1 host
6 ports
2.0		 AC97 2.1 10/100 Ethernet
802.3 MAC
northbridge nForce3 Pro 250 Hypertransport
1600MB/s		 ATA-133
133MB/s
Serial ATA 1
150MB/s
Raid 0,1		 PCI 2.3
33MHz
6 devices		 1 host
6 ports
2.0		 AC97 2.1 10/100 Ethernet
802.3 MAC
SiS Southbridge North
Bridges		 Northbridge
Connection		 ATA
(UDMA)		 PCI USB Audio Other
630
630E		 630
630E		 133MB/s ATA-66
66MB/s		 PCI 2.2
33MHz
4 devices		 2 hosts
5 ports
?		 AC97 10/100 Ethernet
630S
630ST		 630S
630ST		 133MB/s ATA-100
100MB/s		 PCI 2.2
33MHz
4 devices		 2 hosts
6 ports
?		 AC97 10/100 Ethernet
633
633T		 633
633T		 MuTIOL
1066MB/s		 ATA-100
100MB/s		 PCI 2.2
33MHz
6 devices		 2 hosts
6 ports
1.1		 AC97
635
635T		 635
635T		 MuTIOL
1066MB/s		 ATA-100
100MB/s		 PCI 2.2
33MHz
6 devices		 2 hosts
6 ports
1.1		 AC97 10/100 Ethernet
730S 730S 133MB/s ATA-100
100MB/s		 PCI 2.2
33MHz
4 devices		 2 hosts
6 ports
?		 AC97 10/100 Ethernet
733 733 MuTIOL
1200MB/s		 ATA-100
100MB/s		 PCI 2.2
33MHz
6 devices		 2 hosts
6 ports
?		 AC97
735 735 MuTIOL
1200MB/s		 ATA-100
100MB/s		 PCI 2.2
33MHz
6 devices		 2 hosts
6 ports
?		 AC97 10/100 Ethernet
745 745 MuTIOL
1200MB/s		 ATA-100
100MB/s		 PCI 2.2
33MHz
6 devices		 2 hosts
6 ports
?		 AC97 2.1 10/100 Ethernet
IEEE 1394
961 640T
645
646
650
740
750		 MuTIOL
533MB/s		 ATA-100
100MB/s		 PCI 2.2
33MHz
6 devices		 2 hosts
6 ports
1.1		 AC97 2.2 10/100 Ethernet
961B 645DX MuTIOL
533MB/s		 ATA-133
133MB/s		 PCI 2.2
33MHz
6 devices		 2 hosts
6 ports
1.1		 AC97 2.2 10/100 Ethernet
962 651 MuTIOL
533MB/s		 ATA-133
133MB/s		 PCI 2.2
33MHz
6 devices		 2 hosts
6 ports
2.0		 AC97 2.2 10/100 Ethernet
IEEE 1394A
963 648
648DX
655
655FX
R658
660
746
746DX
755
760		 MuTIOL
1066MB/s		 ATA-133
133MB/s		 PCI ?
33MHz
6 devices		 4 hosts
6 ports
2.0		 AC97 2.2 10/100 Ethernet
IEEE 1394A
963L 648FX
746FX		 MuTIOL
1066MB/s		 ATA-133
133MB/s		 PCI ?
33MHz
6 devices		 4 hosts
6 ports
2.0		 AC97 2.2 10/100 Ethernet
964 649
655FX
661FX
741
755
760
R659		 MuTIOL
1066MB/s		 Serial ATA-1
150MB/s		 PCI ?
33MHz
6 devices		 ? hosts
8 ports
2.0		 AC97 2.3 10/100 Ethernet
IEEE 1394A
965 ? 3GIO
?MB/s		 Serial ATA-1
150MB/s		 PCI ?
?MHz
? devices		 ? hosts
? ports
2.0		 AC? ?
VIA Southbridge North
Bridges		 Northbridge
Connection		 ATA
(UDMA)		 PCI USB Audio Other
586 Apollo
VP		 133MB/s ATA-33
33MB/s		 PCI 2.1
33MHz
? devices		 1 host
2 ports
1.0		 N/A
586A VP2
VPX		 133MB/s ATA-33
33MB/s		 PCI 2.1
33MHz
? devices		 1 host
2 ports
1.0		 N/A
586B Apollo Pro
VP2/97
VPX/97
VP3		 133MB/s ATA-33
33MB/s		 PCI 2.1
33MHz
5 devices		 1 host
2 ports
1.0		 N/A
596A Apollo Pro+
MVP3		 133MB/s ATA-33
33MB/s		 PCI 2.1
33MHz
5 devices		 1 host
2 ports
1.0		 N/A
596B Apollo Pro133
Apollo Pro133A
Apollo Pro133T
MVP3		 133MB/s ATA-33
33MB/s		 PCI 2.2
33MHz
5 devices		 1 host
2 ports
1.0		 N/A
686A AMD 750
Apollo Pro133
Apollo Pro133A
KT-133
KT-133A
KX-133
MVP4		 133MB/s ATA-66
66MB/s		 PCI 2.2
33MHz
5 devices		 1 host
4 ports
1.1		 AC97 2.0
686B AMD 760
ATI IGP 320
KL-133
KL-133A
KLE133
KT-133E		 133MB/s ATA-66
66MB/s		 PCI 2.2
33MHz
5 devices		 1 host
4 ports
1.1		 AC97 2.0
8231 KM-133
PL-133
PL-133T
PLE133 (PM601)
PLE133T
PM-133		 133MB/s ATA-100
100MB/s		 PCI 2.1
33MHz
5 devices		 2 hosts
4 ports
?		 AC97 10/100 Ethernet
8233 Apollo Pro266
Apollo Pro266T
KT-266
KT-266A
P4M-266
P4M-266A
P4X-266
P4X-266A		 Vlink
266MB/s		 ATA-100
100MB/s		 PCI 2.2
33MHz
5 devices		 2 hosts
4 ports
1.1		 AC97 2.1 10/100 Ethernet
8233A
8233C		 KM-266
KT-266DP
KT-333
P4X-266E		 Vlink
266MB/s		 ATA-133
133MB/s		 PCI 2.2
33MHz
5 devices		 2 hosts
4 ports
1.1		 AC97 2.1 10/100 Ethernet
8235 KM-400
KT-333
KT-333A
KT-400
KT-400A
KT-600
P4M-333
P4X-333
P4X-400
P4X-400A
PT-600		 Vlink
533MB/s		 ATA-133
133MB/s		 PCI 2.1
33MHz
5 devices		 3 hosts
6 ports
2.0		 AC97 10/10 Ethernet
8237 K8T-400M
K8T-800
KM-400
KT-400A
KT-600
PT-800		 Vlink
533MB/s		 ATA-133
133MB/s
Serial ATA-1
150MB/s
Raid 0,1		 PCI 2.2
33MHz
6 devices		 ? hosts
8 ports
2.0		 AC97
VIA 7.1		 10/10 Ethernet
VPX Apollo Pro266T
P4X-266
P4X-266A		 Vlink
533MB/s		 N/A PCI 66/64
66MHz
PCI ?
33MHz
12 devices		 N/A N/A
VPX2 ? Vlink
?MB/s		 N/A 2xPCI-X
133MHz
PCI ?
33MHz
12 devices		 N/A N/A

 

The following table lists the maximum theoretical bandwidth available from the various types of DRAM. It does not necessarily imply that the system can actually utilize the maximum bandwidths listed.

DRAM Type Name Base
Memory
Speed		 DDR/
QDR		 Bus
Width
(bits)		 Bits
per
Byte		 Single Channel
Theoretical
Bandwidth		 Dual Channel
Theoretical
Bandwidth		 Quad Channel
Theoretical
Bandwidth
SDRAM PC66 66MHz -- 64 8 533MB/s 1066MB/s 2133MB/s
PC100 100MHz -- 64 8 800MB/s 1600MB/s 3200MB/s
PC133 133MHz -- 64 8 1066MB/s 2133MB/s 4266MB/s
"PC150" 150MHz -- 64 8 1200MB/s 2400MB/s 4800MB/s
DDR SDRAM PC1600
(DDR200)		 100MHz x2 64 8 1600MB/s 3200MB/s 6400MB/s
PC2100
(DDR266)		 133MHz x2 64 8 2133MB/s 4266MB/s 8533MB/s
"PC2400" 150MHz x2 64 8 2400MB/s 4800MB/s 9600MB/s
PC2700
(DDR333)		 166MHz x2 64 8 2666MB/s 5333MB/s 10666MB/s
PC3200
(DDR400)		 200MHz x2 64 8 3200MB/s 6400MB/s 12800MB/s
QDR SDRAM PC1600
(QDR400)		 100MHz x4 64 8 3200MB/s 6400MB/s
PC2100
(QDR533)		 133MHz x4 64 8 4266MB/s 8533MB/s
PC2700
(QDR666)		 166MHz x4 64 8 5333MB/s 10666MB/s
DDR-II SDRAM PC3200
(DDRII-400)		 200MHz x2 64 8 3200MB/s 6400MB/s 12800MB/s
PC4300
(DDRII-533)		 266MHz x2 64 8 4266MB/s 8533MB/s 16466MB/s
PC5400
(DDRII-667)		 333MHz x2 64 8 5333MB/s 10666MB/s 21333MB/s
PC6400
(DDRII-800)		 400MHz x2 64 8 6400MB/s 12800MB/s 25600MB/s
Rambus PC600 266MHz x2 16 8 1066MB/s 2133MB/s
PC600 300MHz x2 16 8 1200MB/s 2400MB/s
PC700 300MHz x2 16 8 1200MB/s 2400MB/s
PC700 356MHz x2 16 8 1424MB/s 2848MB/s
PC800 400MHz x2 16 8 1600MB/s 3200MB/s
Rambus Hastings PC1066 533MHz x2 16 8 4266MB/s
PC1200 600MHz x2 16 8 4800MB/s
Rambus
"32-bit" modules		 PC1066 533MHz x2 16 8 4266MB/s
PC1200 600MHz x2 16 8 4800MB/s
Rambus
"64-bit" modules		 PC1066 533MHz x2 16 8 8533MB/s
PC1200 600MHz x2 16 8 9600MB/s

"PC150" and "PC2400" are not recognized specifications; they're just overclocked PC133 SDRAM and PC2100 DDR.

QDR SDRAM is not a different type of memory. It is standard DDR SDRAM that is utilized by the chipset as a double-sided memory stick where each DIMM bank (side) can be accessed almost simultaneously. This obviously will only work with double-sided DIMMs and requires a specially designed DIMM to deal with the signalling.

When used with a 133MHz FSB (front side bus) PC600 Rambus only operates at 266MHz base clock. When used with a 100MHz FSB PC700 only runs at 300MHz base clock. PC800 can operate at 400MHz regardless of the speed (100 or 133MHz) of the FSB. PC700 is only supported on the i820 chipset.

Rambus 32-bit RIMMs are effectively 32-bits wide, but in reality two 16-bit wide channels are contained on one module, so the chipset still sees it as dual channel. The same is true for 64-bit modules; they use four 16-bit channels on a single module.


The following table presents a *generalized* view of what the L2 cacheability range is for various direct-mapped L2 and Tag bit configurations. The table reflects the assumption that the dirty bit that is needed in write-back mode must come from the TagRAM bits, and is not a separate bit within the chipset itself. Not all chipsets necessarily follow this assumption. And if the chipset does have a separate dirty bit, then the amount of memory that can be cached in write-back mode is the same as write-through.

Cacheable Memory Range
(Direct-Mapped only)
Tag Bits
L2 Size 6 7 8 9 10 11 12 13 14 15 16 17 18 19
64KB WT 4M 8M 16M 32M 64M 128M 256M 512M 1G 2G 4G 8G 16G 32G
WB 2M 4M 8M 16M 32M 64M 128M 256M 512M 1G 2G 4G 8G 16G
128KB WT 8M 16M 32M 64M 128M 256M 512M 1G 2G 4G 8G 16G 32G 64G
WB 4M 8M 16M 32M 64M 128M 256M 512M 1G 2G 4G 8G 16G 32G
256KB WT 16M 32M 64M 128M 256M 512M 1G 2G 4G 8G 16G 32G 64G 128G
WB 8M 16M 32M 64M 128M 256M 512M 1G 2G 4G 8G 16G 32G 64G
512KB WT 32M 64M 128M 256M 512M 1G 2G 4G 8G 16G 32G 64G 128G 256G
WB 16M 32M 64M 128M 256M 512M 1G 2G 4G 8G 16G 32G 64G 128G
1MB WT 64M 128M 256M 512M 1G 2G 4G 8G 16G 32G 64G 128G 256G 512G
WB 32M 64M 128M 256M 512M 1G 2G 4G 8G 16G 32G 64G 128G 256G
2MB WT 128M 256M 512M 1G 2G 4G 8G 16G 32G 64G 128G 256G 512G 1T
WB 64M 128M 256M 512M 1G 2G 4G 8G 16G 32G 64G 128G 256G 512G

In write-through mode the amount of memory that can be cached (addressed) by the L2 cache SRAM is dependent on the amount of L2 cache and the width of the TagRAM. For direct-mapped caches, the size of the L2 cache is one cache page. The Tag bits define the number of memory addresses the cache-size pages can be mapped to. So if you have 512KB of L2 cache and a 7-bit Tag width, the cache page is 512KB and the number of unique addresses that can be defined by the Tag is 128 {27 = 128}. This translates into 64MB cacheable in write-through mode {512KB * 128}. An 8-bit Tag can define 256 addresses, and so with 512KB can cache 128MB of RAM. Every additional Tag bit that is added effectively doubles the amount of cacheable memory.

In write-back mode, you must use one of the Tag bits as a modified (dirty) bit, so the amount of addressable memory is reduced by half. That same 512KB of cache with the 8 bits of TagRAM (actually 7 Tag bits and 1 dirty bit) can only address 64 megabytes of main memory in write-back mode {512KB * 27 = 64MB}, half that of write-through mode.

This does *not* apply to the 2-way, 4-way, or 8-way set associative caches found on various 6th generation processors; only to direct-mapped cache. For direct-mapped caches, the Tag addresses map an entire cache page to memory; for set-associative, the Tags map cache sets (two, four, or eight cache lines, depending on the associativity).

Note that the math here is just quick and dirty. For a much better explanation of how this works, see The PC Guide, Caches and Their Design, and section 2.27 of the CSIPHC FAQ.

The following table is a list of the L2 cacheable ranges for various 6th generation processors that have L2 cache built onto the chip, die, or substrate. All cacheability issues are handled by an on-Chip TagRAM; the motherboard's chipset does not deal with the cacheable range for this L2 at all. All caches are in write-back mode (a separate pair of MESI bits is used to determine the cache state: Modified, Exclusive, Shared, or Invalid).

Chip       Codename    Voltage  Stepping  L2 Cache Range
P-II  233   Klamath     2.8/3.3  6-3-3     512MB
P-II  233   Klamath     2.8/3.3  6-3-4     512MB
P-II  266   Klamath     2.8/3.3  6-3-3     512MB
P-II  266   Klamath     2.8/3.3  6-3-4     512MB
P-II  266   Deschutes   2.0/3.3  6-5-0     512MB
P-II  266   Deschutes   2.0/3.3  6-5-2     4GB
P-II  300   Klamath     2.8/3.3  6-3-3     512MB
P-II  300   Klamath     2.8/3.3  6-3-4     512MB
P-II  300   Deschutes   2.0/3.3  6-5-2     4GB
P-II  333   Deschutes   2.0/3.3  6-5-0     512MB
P-II  333   Deschutes   2.0/3.3  6-5-1     4GB
P-II  333   Deschutes   2.0/3.3  6-5-2     4GB
P-II  350   Deschutes   2.0/3.3  6-5-1     4GB
P-II  350   Deschutes   2.0/3.3  6-5-2     4GB
P-II  350   Deschutes   2.0/3.3  6-5-3     4GB
P-II  400   Deschutes   2.0/3.3  6-5-1     4GB
P-II  400   Deschutes   2.0/3.3  6-5-2     4GB
P-II  400   Deschutes   2.0/3.3  6-5-3     4GB
P-II  450   Deschutes   2.0/3.3  6-5-2     4GB

P-3   450   Katmai      2.0/3.3  6-7-2     4GB
P-3   450   Katmai      2.0/3.3  6-7-3     4GB
P-3   500   Katmai      2.0/3.3  6-7-2     4GB
P-3   500   Katmai      2.0/3.3  6-7-3     4GB
P-3   500E  Cumine PGA  1.6      6-8-1     4GB
P-3   500E  Cumine PGA  1.65     6-8-3     4GB
P-3   533B  Katmai      2.0/3.3  6-7-3     4GB
P-3   533EB Coppermine  1.65     6-8-1     4GB
P-3   533EB Coppermine  1.65     6-8-3     4GB
P-3   533EB Cumine PGA  1.65     6-8-1     4GB
P-3   533EB Cumine PGA  1.65     6-8-3     4GB
P-3   550   Katmai      2.0/3.3  6-7-3     4GB
P-3   550E  Coppermine  1.65     6-8-1     4GB
P-3   550E  Coppermine  1.65     6-8-3     4GB
P-3   550E  Cumine PGA  1.6      6-8-1     4GB
P-3   550E  Cumine PGA  1.65     6-8-3     4GB
P-3   550E  Cumine PGA  1.7      6-8-6     4GB
P-3   600   Katmai      2.05/3.3 6-7-3     4GB
P-3   600B  Katmai      2.05/3.3 6-7-3     4GB
P-3   600E  Coppermine  1.65     6-8-1     4GB
P-3   600E  Coppermine  1.65     6-8-3     4GB
P-3   600E  Coppermine  1.65     6-8-6     4GB
P-3   600E  Cumine PGA  1.65     6-8-1     4GB
P-3   600E  Cumine PGA  1.65     6-8-3     4GB
P-3   600E  Cumine PGA  1.7      6-8-6     4GB
P-3   600E  Cumine PGA  1.75     6-8-A     4GB
P-3   600EB Coppermine  1.65     6-8-1     4GB
P-3   600EB Coppermine  1.65     6-8-3     4GB
P-3   600EB Coppermine  1.65     6-8-6     4GB
P-3   600EB Cumine PGA  1.65     6-8-1     4GB
P-3   600EB Cumine PGA  1.65     6-8-3     4GB
P-3   600EB Cumine PGA  1.7      6-8-6     4GB
P-3   650   Coppermine  1.65     6-8-1     4GB
P-3   650   Coppermine  1.65     6-8-3     4GB
P-3   650   Coppermine  1.65     6-8-6     4GB
P-3   650   Cumine PGA  1.65     6-8-1     4GB
P-3   650   Cumine PGA  1.65     6-8-3     4GB
P-3   650   Cumine PGA  1.7      6-8-6     4GB
P-3   667   Coppermine  1.65     6-8-1     4GB
P-3   667   Coppermine  1.65     6-8-3     4GB
P-3   667   Coppermine  1.65     6-8-6     4GB
P-3   667   Cumine PGA  1.65     6-8-1     4GB
P-3   667   Cumine PGA  1.65     6-8-3     4GB
P-3   667   Cumine PGA  1.7      6-8-6     4GB
P-3   700   Coppermine  1.65     6-8-1     4GB
P-3   700   Coppermine  1.65     6-8-3     4GB
P-3   700   Coppermine  1.65     6-8-6     4GB
P-3   700   Cumine PGA  1.65     6-8-1     4GB
P-3   700   Cumine PGA  1.65     6-8-3     4GB
P-3   700   Cumine PGA  1.7      6-8-6     4GB
P-3   700   Cumine PGA  1.75     6-8-A     4GB
P-3   733   Coppermine  1.65     6-8-1     4GB
P-3   733   Coppermine  1.65     6-8-3     4GB
P-3   733   Coppermine  1.65     6-8-6     4GB
P-3   733   Cumine PGA  1.65     6-8-1     4GB
P-3   733   Cumine PGA  1.65     6-8-3     4GB
P-3   733   Cumine PGA  1.7      6-8-6     4GB
P-3   733   Cumine PGA  1.75     6-8-A     4GB
P-3   750   Coppermine  1.65     6-8-1     4GB
P-3   750   Coppermine  1.65     6-8-3     4GB
P-3   750   Coppermine  1.65     6-8-6     4GB
P-3   750   Cumine PGA  1.65     6-8-1     4GB
P-3   750   Cumine PGA  1.65     6-8-3     4GB
P-3   750   Cumine PGA  1.7      6-8-6     4GB
P-3   750   Cumine PGA  1.75     6-8-A     4GB
P-3   800   Coppermine  1.65     6-8-1     4GB
P-3   800   Coppermine  1.65     6-8-3     4GB
P-3   800   Coppermine  1.65     6-8-6     4GB
P-3   800E  Cumine PGA  1.65     6-8-1     4GB
P-3   800E  Cumine PGA  1.65     6-8-3     4GB
P-3   800E  Cumine PGA  1.7      6-8-6     4GB
P-3   800E  Cumine PGA  1.75     6-8-A     4GB
P-3   800EB Coppermine  1.65     6-8-1     4GB
P-3   800EB Coppermine  1.65     6-8-3     4GB
P-3   800EB Coppermine  1.65     6-8-6     4GB
P-3   800EB Cumine PGA  1.65     6-8-1     4GB
P-3   800EB Cumine PGA  1.65     6-8-3     4GB
P-3   800EB Cumine PGA  1.7      6-8-6     4GB
P-3   800EB Cumine PGA  1.75     6-8-A     4GB
P-3   850   Coppermine  1.65     6-8-3     4GB
P-3   850   Coppermine  1.65     6-8-6     4GB
P-3   850   Cumine PGA  1.65     6-8-3     4GB
P-3   850   Cumine PGA  1.7      6-8-6     4GB
P-3   850   Cumine PGA  1.75     6-8-A     4GB
P-3   866   Coppermine  1.65     6-8-3     4GB
P-3   866   Coppermine  1.65     6-8-6     4GB
P-3   866   Cumine PGA  1.65     6-8-3     4GB
P-3   866   Cumine PGA  1.7      6-8-6     4GB
P-3   866   Cumine PGA  1.75     6-8-A     4GB
P-3   866   Cumine-T    1.75     6-8-A     4GB
P-3   933   Coppermine  1.7      6-8-3     4GB
P-3   933   Coppermine  1.7      6-8-6     4GB
P-3   933   Cumine PGA  1.65     6-8-3     4GB
P-3   933   Cumine PGA  1.7      6-8-6     4GB
P-3   933   Cumine PGA  1.75     6-8-A     4GB
P-3   933   Cumine-T    1.75     6-8-A     4GB
P-3   1.0   Coppermine  1.7      6-8-6     4GB
P-3   1.0   Cumine PGA  1.75     6-8-A     4GB
P-3   1.0B  Coppermine  1.7      6-8-3     4GB
P-3   1.0B  Cumine PGA  1.7      6-8-3     4GB
P-3   1.0B  Cumine PGA  1.7      6-8-6     4GB
P-3   1.0B  Cumine PGA  1.76     6-8-6     4GB
P-3   1.0B  Cumine PGA  1.75     6-8-A     4GB
P-3   1.0B  Cumine-T    1.75     6-8-A     4GB
P-3   1.10  Cumine PGA  1.75     6-8-A     4GB
P-3   1.13  Coppermine  1.8      6-8-6     4GB
P-3   1.13  Cumine PGA  1.75     6-8-A     4GB
P-3   1.13  Cumine-T    1.75     6-8-A     4GB
P-3   1.0B  Tualatin256 1.475    6-B-1     64GB
P-3   1.13A Tualatin256 1.475    6-B-1     64GB
P-3   1.13A Tualatin256 1.5      6-B-4     64GB
P-3   1.2   Tualatin256 1.475    6-B-1     64GB
P-3   1.2   Tualatin256 1.5      6-B-4     64GB
P-3   1.33  Tualatin256 1.5      6-B-1     64GB
P-3   1.4   Tualatin256 1.5      6-B-1     64GB
P-3   1.4   Tualatin256 1.5      6-B-4     64GB
P-3-S 700   Tualatin512 1.1      6-B-x     64GB
P-3-S 1.13  Tualatin512 1.45     6-B-1     64GB
P-3-S 1.13  Tualatin512 1.45     6-B-4     64GB
P-3-S 1.26  Tualatin512 1.45     6-B-1     64GB
P-3-S 1.26  Tualatin512 1.45     6-B-4     64GB
P-3-S 1.4   Tualatin512 1.45     6-B-1     64GB
P-3-S 1.4   Tualatin512 1.45     6-B-4     64GB

Cel   266   Covington   2.0      6-5-0     N/A
Cel   266   Covington   2.0      6-5-1     N/A
Cel   266   Covington   2.0      6-5-2     N/A
Cel   300   Covington   2.0      6-5-0     N/A
Cel   300   Covington   2.0      6-5-1     N/A
Cel   300   Covington   2.0      6-5-2     N/A
Cel   300A  Mendocino   2.0      6-6-0     4GB
Cel   300A  Mendocino   2.0      6-6-5     4GB
Cel   333   Mendocino   2.0      6-6-0     4GB
Cel   333   Mendocino   2.0      6-6-5     4GB
Cel   366   Mendocino   2.0      6-6-0     4GB
Cel   366   Mendocino   2.0      6-6-5     4GB
Cel   400   Mendocino   2.0      6-6-0     4GB
Cel   400   Mendocino   2.0      6-6-5     4GB
Cel   433   Mendocino   2.0      6-6-0     4GB
Cel   433   Mendocino   2.0      6-6-5     4GB
Cel   466   Mendocino   2.0      6-6-5     4GB
Cel   500   Mendocino   2.0      6-6-5     4GB
Cel   500A  Cumine-128  1.5      6-8-3     4GB
Cel   533   Mendocino   2.0      6-6-5     4GB
Cel   500A  Cumine-128  1.5      6-8-3     4GB
Cel   533A  Cumine-128  1.5      6-8-3     4GB
Cel   533A  Cumine-128  1.7      6-8-6     4GB
Cel   566   Cumine-128  1.5      6-8-3     4GB
Cel   566   Cumine-128  1.7      6-8-6     4GB
Cel   566   Cumine-128  1.75     6-8-A     4GB
Cel   600   Cumine-128  1.5      6-8-3     4GB
Cel   600   Cumine-128  1.7      6-8-6     4GB
Cel   600   Cumine-128  1.75     6-8-A     4GB
Cel   633   Cumine-128  1.65     6-8-3     4GB
Cel   633   Cumine-128  1.7      6-8-6     4GB
Cel   633   Cumine-128  1.75     6-8-A     4GB
Cel   667   Cumine-128  1.65     6-8-3     4GB
Cel   667   Cumine-128  1.7      6-8-6     4GB
Cel   667   Cumine-128  1.75     6-8-A     4GB
Cel   700   Cumine-128  1.65     6-8-3     4GB
Cel   700   Cumine-128  1.7      6-8-6     4GB
Cel   700   Cumine-128  1.75     6-8-A     4GB
Cel   733   Cumine-128  1.65     6-8-3     4GB
Cel   733   Cumine-128  1.7      6-8-6     4GB
Cel   733   Cumine-128  1.75     6-8-A     4GB
Cel   766   Cumine-128  1.65     6-8-3     4GB
Cel   766   Cumine-128  1.7      6-8-6     4GB
Cel   766   Cumine-128  1.75     6-8-A     4GB
Cel   800   Cumine-128  1.65     6-8-3     4GB
Cel   800   Cumine-128  1.7      6-8-6     4GB
Cel   800   Cumine-128  1.75     6-8-A     4GB
Cel   850   Cumine-128  1.65     6-8-3     4GB
Cel   850   Cumine-128  1.7      6-8-6     4GB
Cel   850   Cumine-128  1.75     6-8-A     4GB
Cel   900   Cumine-128  1.75     6-8-A     4GB
Cel   900A  Tualatin    1.475    6-B-1     4GB
Cel   950   Cumine-128  1.75     6-8-A     4GB
Cel   1.0G  Cumine-128  1.75     6-8-A     4GB
Cel   1.1G  Cumine-128  1.75     6-8-A     4GB
Cel   1.0A  Tualatin    1.475    6-B-1     4GB
Cel   1.0A  Tualatin    1.5      6-B-4     4GB
Cel   1.1A  Tualatin    1.475    6-B-1     4GB
Cel   1.1A  Tualatin    1.5      6-B-4     4GB
Cel   1.2G  Tualatin    1.475    6-B-1     4GB
Cel   1.2G  Tualatin    1.5      6-B-1     4GB
Cel   1.2G  Tualatin    1.5      6-B-4     4GB
Cel   1.3G  Tualatin    1.5      6-B-1     4GB
Cel   1.3G  Tualatin    1.5      6-B-4     4GB
Cel   1.4G  Tualatin    1.5      6-B-1     4GB
Cel   1.4G  Tualatin    1.5      6-B-4     4GB

PPro  all   P6          various  6-1-x     64GB
P-II  ODP   P6T         2.0/2.5  6-3-2     64GB

Xeon  400   Drake       2.0/2.5  6-5-2     64GB
Xeon  400   Drake       2.0/2.5  6-5-3     64GB
Xeon  450   Drake       2.0/2.7  6-5-3     64GB
Xeon  500   Tanner      2.0/2.7  6-7-2     64GB
Xeon  500   Tanner      2.0/2.7  6-7-3     64GB
Xeon  550   Tanner      2.0/2.0  6-7-3     64GB
Xeon  600   Cascades    various  6-8-1     64GB
Xeon  600   Cascades    various  6-8-3     64GB
Xeon  667   Cascades    various  6-8-1     64GB
Xeon  667   Cascades    various  6-8-3     64GB
Xeon  700   Cascades    various  6-A-x     64GB
Xeon  700   Cascades    various  6-A-4     64GB
Xeon  733   Cascades    various  6-8-1     64GB
Xeon  733   Cascades    various  6-8-3     64GB
Xeon  733   Cascades    various  6-8-6     64GB
Xeon  800   Cascades    various  6-8-1     64GB
Xeon  800   Cascades    various  6-8-3     64GB
Xeon  800   Cascades    various  6-8-6     64GB
Xeon  866   Cascades    various  6-8-3     64GB
Xeon  866   Cascades    various  6-8-6     64GB
Xeon  900   Cascades    various  6-A-4     64GB
Xeon  933   Cascades    various  6-8-3     64GB
Xeon  933   Cascades    various  6-8-6     64GB
Xeon  1.0B  Cascades    various  6-8-6     64GB

K6-3  400   Sharptooth  2.4/3.3  5-9-x     4GB
K6-3  450   Sharptooth  2.4/3.3  5-9-x     4GB
K6-2+ 450   ?           2.0/3.3  5-D-x     4GB
K6-2+ 475   ?           2.0/3.3  5-D-x     4GB
K6-2+ 500   ?           2.0/3.3  5-D-x     4GB
K6-3+ 450   ?           2.0/3.3  5-D-x     4GB
K6-3+ 475   ?           2.0/3.3  5-D-x     4GB
K6-3+ 500   ?           2.0/3.3  5-D-x     4GB

Athl  500   K7          1.6/3.3  6-1-x     64GB
Athl  550   K7          1.6/3.3  6-1-x     64GB
Athl  550   K75         1.6/3.3  6-2-x     64GB
Athl  600   K7          1.6/3.3  6-1-x     64GB
Athl  600   K75         1.6/3.3  6-2-x     64GB
Athl  650   K7          1.6/3.3  6-1-x     64GB
Athl  650   K75         1.6/3.3  6-2-x     64GB
Athl  650   T-bird      1.7      6-4-x     64GB
Athl  650   T-bird      1.75     6-4-x     64GB
Athl  700   K7          1.6/3.3  6-1-x     64GB
Athl  700   K75         1.6/3.3  6-2-x     64GB
Athl  700   T-bird      1.7      6-4-x     64GB
Athl  700   T-bird      1.75     6-4-x     64GB
Athl  750   K75         1.6/3.3  6-2-x     64GB
Athl  750   T-bird      1.7      6-4-x     64GB
Athl  750   T-bird      1.75     6-4-x     64GB
Athl  800   K75         1.7/3.3  6-2-x     64GB
Athl  800   T-bird      1.7      6-4-x     64GB
Athl  800   T-bird      1.75     6-4-x     64GB
Athl  850   K75         1.7/3.3  6-2-x     64GB
Athl  850   T-bird      1.7      6-4-x     64GB
Athl  850   T-bird      1.75     6-4-x     64GB
Athl  900   K75         1.8/3.3  6-2-x     64GB
Athl  900   T-bird      1.75     6-4-x     64GB
Athl  950   K75         1.8/3.3  6-2-x     64GB
Athl  950   T-bird      1.75     6-4-x     64GB
Athl  1G    K75         1.8/3.3  6-2-x     64GB
Athl  1G    T-bird      1.75     6-4-x     64GB
Athl  1.1G  T-bird      1.75     6-4-x     64GB
Athl  1.13G T-bird      1.75     6-4-x     64GB
Athl  1.2G  T-bird      1.75     6-4-x     64GB
Athl  1.3G  T-bird      1.75     6-4-x     64GB
Athl  1.33G T-bird      1.75     6-4-x     64GB
Athl  1.4G  T-bird      1.75     6-4-x     64GB
AthXP 1500+ Palomino    1.75     6-6-x     64GB
AthXP 1600+ Palomino    1.75     6-6-x     64GB
AthXP 1700+ Palomino    1.75     6-6-x     64GB
AthXP 1800+ Palomino    1.75     6-6-x     64GB
AthXP 1900+ Palomino    1.75     6-6-x     64GB
AthXP 2000+ Palomino    1.75     6-6-x     64GB
AthXP 2100+ Palomino    1.75     6-6-x     64GB
AthXP 1600+ T-bred      1.6      6-8-1     64GB
AthXP 1700+ T-bred      1.5      6-8-0     64GB
AthXP 1700+ T-bred      1.5      6-8-1     64GB
AthXP 1700+ T-bred      1.6      6-8-1     64GB
AthXP 1800+ T-bred      1.5      6-8-0     64GB
AthXP 1800+ T-bred      1.5      6-8-1     64GB
AthXP 1800+ T-bred      1.6      6-8-1     64GB
AthXP 1900+ T-bred      1.5      6-8-0     64GB
AthXP 2000+ T-bred      1.6      6-8-0     64GB
AthXP 2000+ T-bred      1.65     6-8-0     64GB
AthXP 2000+ T-bred      1.6      6-8-1     64GB
AthXP 2100+ T-bred      1.6      6-8-0     64GB
AthXP 2100+ T-bred      1.6      6-8-1     64GB
AthXP 2200+ T-bred      1.65     6-8-0     64GB
AthXP 2200+ T-bred      1.6      6-8-1     64GB
AthXP 2400+ T-bred      1.6      6-8-1     64GB
AthXP 2400+ T-bred      1.65     6-8-1     64GB
AthXP 2600+ T-bred      1.65     6-8-1     64GB
AthXP 2800+ T-bred      1.65     6-8-1     64GB
AthXP 2500+ Barton      1.65     6-8-A     64GB
AthXP 2600+ Barton      1.65     6-8-A     64GB
AthXP 2800+ Barton      1.65     6-8-A     64GB
AthXP 3000+ Barton      1.65     6-8-A     64GB
AthXP 3200+ Barton      1.65     6-8-A     64GB

Duron 550   Spitfire    1.5      6-3-0     64GB
Duron 550   Spitfire    1.5      6-3-1     64GB
Duron 600   Spitfire    1.5      6-3-0     64GB
Duron 600   Spitfire    1.5      6-3-1     64GB
Duron 650   Spitfire    1.5      6-3-0     64GB
Duron 650   Spitfire    1.5      6-3-1     64GB
Duron 700   Spitfire    1.5      6-3-0     64GB
Duron 700   Spitfire    1.5      6-3-1     64GB
Duron 750   Spitfire    1.6      6-3-x     64GB
Duron 800   Spitfire    1.6      6-3-x     64GB
Duron 850   Spitfire    1.6      6-3-x     64GB
Duron 900   Spitfire    1.6      6-3-x     64GB
Duron 900   Morgan      1.75     6-7-x     64GB
Duron 950   Spitfire    1.6      6-3-x     64GB
Duron 950   Morgan      1.75     6-7-x     64GB
Duron 1.0G  Morgan      1.75     6-7-x     64GB
Duron 1.1G  Morgan      1.75     6-7-x     64GB
Duron 1.2G  Morgan      1.75     6-7-x     64GB
Duron 1.4G  Applebred   1.5      6-8-8     64GB
Duron 1.6G  Applebred   1.5      6-8-8     64GB
Duron 1.8G  Applebred   1.5      6-8-8     64GB

AthMP 1.0G  Palomino    1.75     6-6-x     64GB
AthMP 1.2G  Palomino    1.75     6-6-x     64GB
AthMP 1500+ Palomino    1.75     6-6-x     64GB
AthMP 1600+ Palomino    1.75     6-6-x     64GB
AthMP 1800+ Palomino    1.75     6-6-x     64GB
AthMP 1900+ Palomino    1.75     6-6-x     64GB
AthMP 2000+ Palomino    1.75     6-6-x     64GB
AthMP 2000+ T-bred      1.6      6-8-1     64GB
AthMP 2100+ Palomino    1.75     6-6-x     64GB
AthMP 2200+ T-bred      1.65     6-8-1     64GB
AthMP 2400+ T-bred      1.65     6-8-1     64GB
AthMP 2600+ T-bred      1.65     6-8-1     64GB
AthXP 2800+ Barton      1.65     6-8-A     64GB

Notes:

  • The listed stepping only refers to the core CPU stepping ID. On the Pentium II, Pentium III, and Xeon CPUs that have discrete, external cache chips (not the Coppermine and Cascades chips), it isn't the core chip that determines cacheability. Instead, an additional cache controller chip (containing the TagRAM and MESI bits) mounted to the SEC substrate dictates actual cacheable range. It just so happens that certain steppings of certain CPUs are only paired with select cache controllers. For example: On the Pentium II, the 82459AB and 82459AC cache controller chips can cache up to 512MB of RAM. And the 82459AD controller chip can cache up to 4GB of memory. The older Pentium II Klamath chips come with the 82459AB controller and the initial Deschutes chips (6-5-0 step) come with the 82459AC cache controller, and therefore can only cache up to 512MB.
  • The P-Pro has two (or three for the 1MB P-Pro 200) chips in its dual cavity CPU design. One chip is the core die; the other is the cache die. The cache controller and TagRAM bits on the Pentium Pro are built onto the cache chip's die.
  • The Celeron, Pentium-III Coppermine, Xeon Cascades, Pentium Pro OverDrive, and K6-3 have the L2 cache (along with it's controller and TagRAM bits) built on-Die.
  • The Cumine PGA is the Pentium III Coppermine in the FC-PGA package. The Cumine-128 is the Celeron Coppermine-128. Despite their name, the Coppermine chips use aluminum interconnects, not copper.
  • The K7 (Athlon) is an unusual beast in that its primary TagRAM bits are included on the core CPU die itself (even though the L2 is off-Die). This on-Die Tag can utilize 512KB of external L2 cache on the SEC and can cache up to 64GB of RAM (the model 1 Athlon supports PAE-36 memory extensions; the model 2 Athlon supports both PAE-36 and PSE-36). But if there is more than 512KB of external L2 present, then the internal Tag can only provide partial coverage and an external cache controller must provide some of its own Tag bits. The L2 on the K7 is 2-way set associative for 512KB, 1MB, and 2MB cache sizes. For 4MB, 8MB, and 16MB cache sizes, the L2 operates as direct mapped cache.
  • The K7 has a 64-byte (512-bit) cache line size; the Intel P6/P-II/Celeron chips have 32-byte cache lines. The K6 also has 64-byte cache lines, but it's broken down into two 32-byte sectors. The P-4 has 128-byte cache lines broken down into two 64-byte sectors.
  • On the AMD K6 and early K6-2's (5-8-0 step, 26050), the write-allocate function cannot be used on memory addresses above 508MB. The later K6-2 CXT (5-8-C step, 26351) and K6-III chips do not suffer from this limit with write-allocate. AFAIK, this doesn't affect the chip's cacheable range for its L1 cache.
  • Even though the Pentium III Coppermine and Pentium III Xeon Cascades chips both use the same core die, Intel says the Coppermine's L2 only caches up to 4GB of RAM. The Xeon version can cache up to 64GB.
  • Intel originally stated that the L2 cache on the Pentium II OverDrive for Socket 8 systems could cache up to 64GB of memory. The datasheet now says it caches only 4GB; I'm not sure which is correct.
  • Even though many of the chips listed above have 64GB as their cacheable range, anything over 4GB is rather uncommon with x86 architectures. To even address more than 4GB, you need to use an extended memory architecture (PAE-36 or PSE-36). Cacheable ranges above 4GB are technically possible, but are not commonly used. BTW, the AMD K7 also has a 43-bit (8TB) memory mode, but this is an Alpha addressing mode, not x86. Presumably the K7 has enough Tag bits to fully cache this memory space as well.
  • In every case that I'm aware of, the processor's L1 cache can cache the full amount of memory that is addressable by the CPU.

 
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