Comparison: Chipsets for Pentium 4 - Part II
These tables list all of the chipsets for Socket 478
| Features | SiS 645 | SiS 645DX | VIA P4X266 | VIA P4X266A |
| Introduction | Novermber 2001 | March 2002 | August 2001 | December 2001 |
| List Price | $25 | $25 | $25 | $25 |
| Processor Platform | Socket 478 | Socket 478 | Socket 423/478 | Socket 478 |
| Processor Support | Intel Pentium 4 | Intel Pentium 4 | Intel Pentium 4 | Intel Pentium 4 |
| North Bridge | SiS 645 | SiS 645DX | VIA VT8753 | VIA VT8753A |
| South Bridge | SiS 961 | SiS 961 | VIA VT8233 | VIA VT8233A |
| Front Side Bus Clock | 100 MHz | 100/133 MHz | 100 MHz | 100 MHz |
| Memory Clock | 100/133/166 MHz | 100/133/166 MHz | 100/133 MHz | 100/133 MHz |
| FSB-Overclocking | up to 133 MHz | up to 166 MHz | up to 180 MHz | up to 180 MHz |
| AGP 1x / 2x / 4x | yes/yes/yes | yes/yes/yes | yes/yes/yes | yes/yes/yes |
| Max.# DIMM-Slots | 3 | 3 | 4 | 4 |
| Max. Memory | 3.0 G | 3.0 G | 4.0 G | 3.0 G |
| Memory Type |
PC 133 SDRAM DDR333/266 |
PC 100/133 SDRAM DDR333/266/200 |
PC 100/133 SDRAM DDR 333/266 |
DDR 200/266 |
| Ultra-DMA/33/66/100 | yes/yes/yes | yes/yes/yes | yes/yes/yes | yes/yes/yes |
| Ultra-DMA/133 | no | no | no | yes |
| Max. #USB | 4 | 4 | 6 | 6 |
| USB 2.0 | no | no. | no | yes |
| Max. #PCI Slots | 6 | 6 | 5 | 5 |
| ACPI Features | yes | yes | yes | yes |
| Integrated Graphics | yes | yes | no | no |
Source : Individual Company Product Data, DRAMeXchange conducted.
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