some other options if your motherboard is able to do it.
-You might get more,less, or no options at all, depending on your motherboard:
fsb multiplier result
66.66666 mhz * 7.5 = 500 mhz
83.33333 mhz * 7.5 = 625 mhz
100 mhz * 7.5 = 750 mhz
I don't remember when intel started converting celeron to .18 micro(533mhz?)...
Even with water cooling, it'll be hard/imposible? to get a celeron .25 micron to 750 mhz
ShinSa, your celeron 566 is .18 micron, so its different.