First Look Exclusive: VIA KT400 for AMD Athlon

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Comparison: VIA KT400 Vs. KT333 Vs. KT266A

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Chipset	VIA Apollo KT400	VIA Apollo KT333	VIA Apollo KT266A	VIA Apollo KT266
Introduction	September 2002	February 2002	September 2001	April 2001
Platform	Socket 462	Socket 462	Socket 462	Socket 462
Supported processors	AMD Duron/ Athlon/ XP	AMD Duron/ Athlon/ XP	AMD Duron/ Athlon/ XP	AMD Duron/ Athlon/ XP
Multi-processor support	no	no	no	no
Northbridge	VIA KT400	VIA KT333	VIA KT266A	VIA VT8366
Southbridge	VIA VT8235	VIA VT8233A	VIA VT8233	VIA VT8233
Front Side Bus clock	100/133/166 MHz DDR	100/133/166 MHz DDR	100/133 MHz DDR	100/133 MHz DDR
Memory clock	100/133 /166/200 MHz DDR	100/133 /166 MHz DDR	100/133 MHz DDR	100/133 MHz DDR
Asynchronous memory clock	yes	yes	yes	yes
FSB overclocking	up to 250 MHz	up to 230 MHz	up to 200 MHz	up to 200 MHz
Max. # DIMM slots	4	4	4	4
Max. memory	3072 MB	3072 MB	3072 MB	3072 MB
SDRAM support	yes	yes	yes	yes
DDR SDRAM support	yes	yes	yes	yes
Dual-channel DDR support	no	no	no	no
RIMM support (Rambus)	no	no	no	no
Ultra-DMA/33/66 /100/133	yes/yes /yes/yes	yes/yes /yes/yes	yes/yes /yes/no	yes/yes /yes/no
# USB connectors	6	6	6	6
Max. # PCI slots	6	6	6	6
integrated graphics core	no	no	no	no
integrated sound	yes	yes	yes	yes
AGP 1x / 2x / 4x / 8x	yes/yes /yes/yes	yes/yes /yes/no	yes/yes /yes/no	yes/yes /yes/no
ACPI supported	yes	yes	yes	yes
USB 2.0 support	yes	yes	no	no

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Chipset	SiS 746	Nvidia nForce	Nvidia nForce 2	AMD 760
Introduction	June 2002	September 2001	May 2002	February 2001
Platform	Socket 462	Socket 462	Socket 462	Socket 462
Supported processors	AMD Duron /Athlon/XP	AMD Duron /Athlon/XP	AMD Duron /Athlon/XP	AMD Duron /Athlon/XP
Multi-processor support	no	no	no	no
Northbridge	SiS 746	Nvidia IGP 128	Nvidia IGP 128	AMD 761
Southbridge	SiS 963	Nvidia MCP-D	Nvidia MCP-D	AMD 765
Front Side Bus clock	66/100 /133/166 MHz DDR	100/133 MHz DDR	100/133 MHz DDR	100/133 MHz DDR
Memory clock	66/100 /133/166 MHz DDR	100/133 MHz DDR	100/133 /166/200 MHz DDR	100/133 MHz DDR
Asynchronous memory clock	yes	yes	yes	yes
FSB overclocking	up to 200 MHz	up to 150 MHz	up to 240 MHz	up to 150 MHz
Max. # DIMM slots	3	3	3	4
Max. memory	3072 MB	3072 MB	3072 MB	2048 MB
SDRAM support	yes	no	no	no
DDR SDRAM support	yes	yes	yes	yes
Dual-channel DDR support	no	yes	yes	no
RIMM support (Rambus)	no	no	no	no
Ultra-DMA/33/66 /100/133	yes/yes /yes/yes	yes/yes /yes/no	yes/yes /yes/no	yes/yes /yes/no
# USB connectors	6	6	6	4
Max. # PCI slots	6	6	6	4
integrated graphics core	no	yes	yes	no
integrated sound	yes	yes	yes	yes
AGP 1x / 2x / 4x / 8x	yes/yes /yes/yes	yes/yes /yes/no	yes/yes /yes/yes	yes/yes /yes/no
ACPI supported	yes	yes	yes	yes
USB 2.0 support	yes	no	yes	no

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Chipset	ALi Magik 1	SiS 745	SiS 735
Introduction	February 2001	May 2002	May 2001
Platform	Socket 462	Socket 462	Socket 462
Supported processors	AMD Duron/Athlon/XP	AMD Duron/Athlon/XP	AMD Duron/Athlon/XP
Multi-processor support	no	no	no
Northbridge	ALi M1647	SiS 745	SiS 735
Southbridge	ALi M1535D+	integrated	integrated
Front Side Bus clock	100/133 MHz DDR	66/100/133/166 MHz DDR	66/100/133 MHz DDR
Memory clock	100/133 MHz DDR	66/100/133/166 MHz DDR	66/100/133 MHz DDR
Asynchronous memory clock	yes	yes	yes
FSB overclocking	up to 150 MHz	up to 200 MHz	up to 150 MHz
Max. # DIMM slots	4	3	3
Max. memory	1024 MB	3072 MB	1536 MB
SDRAM support	yes	yes	yes
DDR SDRAM support	yes	yes	yes
Dual-channel DDR support	no	no	no
RIMM support (Rambus)	no	no	no
Ultra-DMA/33/66/100/133	yes/yes/yes/no	yes/yes/yes/no	yes/yes/yes/no
# USB connectors	6	6	6
Max. # PCI slots	6	6	6
integrated graphics core	no	no	no
integrated sound	yes	yes	yes
AGP 1x / 2x / 4x / 8x	yes/yes/yes/no	yes/yes/yes/no	yes/yes/yes/no
ACPI supported	yes	yes	yes
USB 2.0 support	no	no	no

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.

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