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First Look Exclusive: VIA KT400 for AMD Athlon

Comparison: VIA KT400 Vs. KT333 Vs. KT266A

ChipsetVIA Apollo KT400VIA Apollo KT333VIA Apollo KT266AVIA Apollo KT266
IntroductionSeptember 2002February 2002September 2001April 2001
PlatformSocket 462Socket 462Socket 462Socket 462
Supported processorsAMD Duron/ Athlon/ XPAMD Duron/ Athlon/ XPAMD Duron/ Athlon/ XPAMD Duron/ Athlon/ XP
Multi-processor supportnononono
NorthbridgeVIA KT400VIA KT333VIA KT266AVIA VT8366
SouthbridgeVIA VT8235VIA VT8233AVIA VT8233VIA VT8233
Front Side Bus clock100/133/166 MHz DDR100/133/166 MHz DDR100/133 MHz DDR100/133 MHz DDR
Memory clock100/133 /166/200 MHz DDR100/133 /166 MHz DDR100/133 MHz DDR100/133 MHz DDR
Asynchronous memory clockyesyesyesyes
FSB overclockingup to 250 MHzup to 230 MHzup to 200 MHzup to 200 MHz
Max. # DIMM slots4444
Max. memory3072 MB3072 MB3072 MB3072 MB
SDRAM supportyesyesyesyes
DDR SDRAM supportyesyesyesyes
Dual-channel DDR supportnononono
RIMM support (Rambus)nononono
Ultra-DMA/33/66 /100/133yes/yes /yes/yesyes/yes /yes/yesyes/yes /yes/noyes/yes /yes/no
# USB connectors6666
Max. # PCI slots6666
integrated graphics corenononono
integrated soundyesyesyesyes
AGP 1x / 2x / 4x / 8xyes/yes /yes/yesyes/yes /yes/noyes/yes /yes/noyes/yes /yes/no
ACPI supportedyesyesyesyes
USB 2.0 supportyesyesnono
ChipsetSiS 746Nvidia nForceNvidia nForce 2AMD 760
IntroductionJune 2002September 2001May 2002February 2001
PlatformSocket 462Socket 462Socket 462Socket 462
Supported processorsAMD Duron /Athlon/XPAMD Duron /Athlon/XPAMD Duron /Athlon/XPAMD Duron /Athlon/XP
Multi-processor supportnononono
NorthbridgeSiS 746Nvidia IGP 128Nvidia IGP 128AMD 761
SouthbridgeSiS 963Nvidia MCP-DNvidia MCP-DAMD 765
Front Side Bus clock66/100 /133/166 MHz DDR100/133 MHz DDR100/133 MHz DDR100/133 MHz DDR
Memory clock66/100 /133/166 MHz DDR100/133 MHz DDR100/133 /166/200 MHz DDR100/133 MHz DDR
Asynchronous memory clockyesyesyesyes
FSB overclockingup to 200 MHzup to 150 MHzup to 240 MHzup to 150 MHz
Max. # DIMM slots3334
Max. memory3072 MB3072 MB3072 MB2048 MB
SDRAM supportyesnonono
DDR SDRAM supportyesyesyesyes
Dual-channel DDR supportnoyesyesno
RIMM support (Rambus)nononono
Ultra-DMA/33/66 /100/133yes/yes /yes/yesyes/yes /yes/noyes/yes /yes/noyes/yes /yes/no
# USB connectors6664
Max. # PCI slots6664
integrated graphics corenoyesyesno
integrated soundyesyesyesyes
AGP 1x / 2x / 4x / 8xyes/yes /yes/yesyes/yes /yes/noyes/yes /yes/yesyes/yes /yes/no
ACPI supportedyesyesyesyes
USB 2.0 supportyesnoyesno
ChipsetALi Magik 1SiS 745SiS 735
IntroductionFebruary 2001May 2002May 2001
PlatformSocket 462Socket 462Socket 462
Supported processorsAMD Duron/Athlon/XPAMD Duron/Athlon/XPAMD Duron/Athlon/XP
Multi-processor supportnonono
NorthbridgeALi M1647SiS 745SiS 735
SouthbridgeALi M1535D+integratedintegrated
Front Side Bus clock100/133 MHz DDR66/100/133/166 MHz DDR66/100/133 MHz DDR
Memory clock100/133 MHz DDR66/100/133/166 MHz DDR66/100/133 MHz DDR
Asynchronous memory clockyesyesyes
FSB overclockingup to 150 MHzup to 200 MHzup to 150 MHz
Max. # DIMM slots433
Max. memory1024 MB3072 MB1536 MB
SDRAM supportyesyesyes
DDR SDRAM supportyesyesyes
Dual-channel DDR supportnonono
RIMM support (Rambus)nonono
Ultra-DMA/33/66/100/133yes/yes/yes/noyes/yes/yes/noyes/yes/yes/no
# USB connectors666
Max. # PCI slots666
integrated graphics corenonono
integrated soundyesyesyes
AGP 1x / 2x / 4x / 8xyes/yes/yes/noyes/yes/yes/noyes/yes/yes/no
ACPI supportedyesyesyes
USB 2.0 supportnonono

The table above lists all the latest chipsets for the AMD platform (Socket 462) with DDR SDRAM support. Completely outmoded chipsets with SDRAM support (such as the VIA KT133 or KT133A) are not included here, because boards with these chips have not been produced or available on the market for quite a while.