SiS Kicks Off: 10 Motherboards With The 645 Chipset and DDR333

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Comparison Of All Pentium 4 Chipsets

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Chipset	Intel 850	Intel 845D	Intel 845	VIA P4X266A	VIA P4X266	SiS 645
Launch Date	Jan-01	Dec-01	Jul-01	Dec-01	Aug-01	Nov-01
CPU Platform	Socket 423/478	Socket 478	Socket 423/478	Socket 478	Socket 423/478	Socket 478
Processors Supported	Intel Pentium 4	Intel Pentium 4	Intel Pentium 4	Intel Pentium 4	Intel Pentium 4	Intel Pentium 4
Multiprocessor Support	yes	no	no	no	no	no
Chipset Northbridge	Intel KC82850	Intel 82845	Intel 82845	VIA P4X266A	VIA VT8753	SiS 645
Chipset Southbridge	Intel 82801 BA	Intel 82801 BA	Intel 82801 BA	VIA VT8233CE	VIA VT8233	SiS 961
Front Side Bus Clock	100/133 MHz	66/100/133 MHz	66/100/133 MHz	66/100/133 MHz	100 MHz	100/133 MHz
Memoryclock	400 MHz	100/133 MHz DDR-SDRAM	100/133 MHz SDRAM	100/133 MHz DDR-SDRAM	100/133 MHz SDR/DDR	100/133 /166 MHz DDR-SDRAM
Asynchronous Memory Clock	yes	yes	yes	yes	yes	yes
FSB Overclocking *	up to 133 MHz	up to 166 MHz	up to 180 MHz	up to 180 MHz	up to 200 MHz	up to 180 MHz
Max. Number of DIMM Slots	4	3	4	3	4	3
Max. Memory Expansion	2048 MB	2048 MB	2048 MB	3072 MB	4096 MB	3072 MB
SDRAMSupport	no	no	yes	no	yes	yes
DDR SDRAM Support	no	yes	no	yes	yes	yes
VC SDRAM Support	no	no	no	no	yes	no
RIMM-Support (Rambus)	yes	no	no	no	no	no
Dual-RIMM-Support (Rambus)	yes	no	no	no	no	no
Ultra-DMA/33/66/100	yes/yes/yes	yes/yes/yes	yes/yes/yes	yes/yes/yes	yes/yes/yes	yes/yes/yes
Ultra-DMA/133	no	no	no	yes	no	no
Number of USB Ports	4	4	6	6	6	6
USB 2.0	no	no	yes	yes	no	yes
Max. Number of PCI Slots	6	6	6	6	5	6
Integrated Graphics	no	no	no	no	no	no
AGP 1x / 2x / 4x	yes / yes / yes	yes / yes / yes	yes / yes / yes	yes / yes / yes	yes / yes / yes	yes / yes / yes
ACPI Features	yes	yes	yes	yes	yes	yes

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