according to similar post responded to by AndyHui,
"Faster CPUs are supported....all 100MHz FSB based Pentium IIIs are supported, 133MHz FSB P3s can also be used, but this involves clocking the AGP out of spec. Multipliers are not an issue with Intel processors"
basically, you can go up to and beyond 1 ghz. Multipliers are irrelevent on clock locked Intel processors because they ignore motherboard multiplier settings. As long as you have FSB support and stepping support in the BIOS, it is fine.