Pentium 4 Chipsets Compared
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| Chipset | SiS 645DX | SiS 645 | Intel 850E | Intel 850 | Intel 845D |
|---|---|---|---|---|---|
| Processor Platform | Intel Pentium 4 | ||||
| Chipset Northbridge | SiS 645DX | SiS 645 | Intel 82850E | Intel 82850 | Intel 82845 |
| Chipset Southbridge | SiS 961 | SiS 961 | Intel 82801 BA | Intel 82801 BA | Intel 82801 BA |
| Front Side Bus Clock | 400/533 MHz | 400 MHz | 400/533 MHz | 400 MHz | 400 MHz |
| Memory Clock | 100/133/166/200/266/333 MHz | 100/133/200/266 MHz | 400/533 MHz | 400 MHz | 200/266 MHz |
| Asynchronous Memory Clock | yes | yes | yes | yes | yes |
| max. # of memory-Slots | 3 | 3 | 4 | 4 | 3 |
| max. Memory | 3072 MB | 3072 MB | 2048 MB | 2048 MB | 2048 MB |
| SDRAM Support | yes | yes | no | no | no |
| DDR SDRAM Support | yes | yes | no | no | yes |
| RDRAM Support | no | no | yes | yes | no |
| Ultra-DMA/33/66/100 | yes/yes/yes | yes/yes/yes | yes/yes/yes | yes/yes/yes | yes/yes/yes |
| Ultra-DMA/133 | no | no | no | no | no |
| Max. # USB ports | 4 | 4 | 4 | 4 | 4 |
| USB 2.0 | no | no | no | no | no |
| Max.# PCI Slots | 6 | 6 | 6 | 6 | 6 |
| Integrated Graphics | yes | yes | no | no | no |
| AGP 1x / 2x / 4x / 8x | yes / yes / yes / no | yes / yes / yes / no | yes / yes / yes / no | yes / yes / yes / no | yes / yes / yes / no |
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| Chipset | Intel 845E | Intel 845G * | Intel 845 | VIA P4X266A | VIA P4X333 |
|---|---|---|---|---|---|
| Processor Plattform | Intel Pentium 4 | ||||
| Chipset Northbridge | Intel 82845E | Intel 82845G | Intel 82845 | VIA P4X266A | VIA P4X333 |
| Chipset Southbridge | Intel 82801 CA | Intel 82801 CA | Intel 82801 BA | VIA VT8233A | VIA VT8235 |
| Front Side Bus Clock | 400/533 MHz | 400/533 MHz | 400 MHz | 400 MHz | 400/533 MHz |
| Memory Clock | 100/133/200/266 MHz | 100/133/166/200/266/333 MHz | 100/133 MHz | 100/133/200/266 MHz | 100/133/166/200/266/333 MHz |
| Asynchronous Memory Clock | yes | yes | yes | yes | yes |
| max. # of memory Slots | 3 | 3 | 4 | 4 | 4 |
| max. Memory | 2048 MB | 2048 MB | 2048 MB | 3072 MB | 3072 MB |
| SDRAM Support | yes | yes | yes | yes | yes |
| DDR SDRAM Support | yes | yes | no | yes | yes |
| RDRAM Support | 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 |
| Ultra-DMA/133 | no | no | no | yes | yes |
| Max. # USB | 6 | 6 | 4 | 6 | 6 |
| USB 2.0 | yes | yes | no | yes | yes |
| Max.# PCI Slots | 6 | 6 | 6 | 5 | 6 |
| Integrated Graphics | no | yes | no | no | no |
| AGP 1x / 2x / 4x / 8x | yes / yes / yes / no | yes / yes / yes / no | yes / yes / yes / no | yes / yes / yes / no | yes / yes / yes / yes |
| ACPI Features | yes | yes | yes | yes | yes |
* DDR333 will likely be supported in H2/2002
