I dont know about ratios, but unless he has an engineering sample, he wont be able to change the multiplier on any intel chip.
If I made a guess about the ratio, I would beleive it has something to do with the fsb:memory speed, as p4 and such run the memory quad pumped.
But then again, Ive really never dealt with ocing a p4, so what do I know :smile:
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