Q: Does VIA KT333/400 motherboards support 333MHz FSB CPUs?
A: Please refer to the diagram as below:
The AT7 and KX7-333 adopts the VIA KT333 chipset that does not support 333MHz FSB CPUs. The AT7-MAX2 and all KD7 series support 333MHz FSB CPUs. The KD7-E of the KD7 series uses VIA KT333 CF version (Note1), others (including KD7-RAID, KD7E, KD7-B, KD7-S, KD7G) use the KT400 chipset.

Note 1: Please do not disassemble North Bridge Fan to check the version. This will cause the CPU fan temperature improperly cool down and burn the CPU fan, voiding your warranty.

Mainboard Chipsets 266 FSB CPU
 support
333 FSB CPU
support
AT7/AT7-E VIA KT333 Y N
KX7-333/KX7-333R VIA KT333 Y N
AT7-MAX2 VIA KT400 Y Y
KD7/KD7-RAID VIA KT400 Y Y
KD7-E VIA KT333 CF Y Y
KD7-B/KD7-S VIA KT400 Y Y
KG7-G VIA KT400 Y Y