Consistent Development: From KT266 To KT333 And KT400
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| Chipset | VIA Apollo KT400 | VIA Apollo KT333 | VIA Apollo KT266A | VIA Apollo KT266 |
|---|---|---|---|---|
| Launch Date | September 2002 | February 2002 | September 2001 | April 2001 |
| Platform | Socket 462 | Socket 462 | Socket 462 | Socket 462 |
| 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 | 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 | yes | yes | yes | yes |
| Max. # DIMM Slots | 4 | 4 | 4 | 4 |
| Max. Memory | 3072 MB | 3072 MB | 3072 MB | 3072 MB |
| DDR SDRAM Support | yes | yes | yes | yes |
| 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 (USB 2.0) | 6 (USB 2.0) | 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 |
When it comes to VIA's chipset family, progress can divided into two areas: first, there's the performance boost that results from particular methods, such as improving the memory controller - and here, memory increase is included. Secondly, numerous integrated features are updated from time to time to reflect the latest technology, for example, the implementation of UltraATA/133 or USB 2.0. It's difficult to categorize AGP 8x because there are no graphics cards available to test what the real performance advantages are that come with doubled AGP bandwidth.