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.
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