There is a bug in the original KT7A shipping BIOS (WW) which sets the 133Mhz preset FSB to 133.00 rather than 133.33. It is fixed in the WZ BIOS onwards I believe, but if (like me) you still have the WW BIOS for whatever reason you can get around it. Set the FSB to the preset value of 130Mhz, and Set the Plus Mhz value to 3. This will give an almost perfect 133.34 (as reported by WCPUID).