Quote Originally Posted by Kensek View Post
It's all about voltages. A CPU FSB of 400 usually requires 1.63v on the NB. 450 FSB 1.67-1.70v. 475FSB 1.70v+

Also the CPU needs 1.325 for 450FSB. and with VDroop 1.355v.

If your your BIOS doesn't have the full barrage of Voltage adjustments you are screwed, more than likely.

You need to tweak NB to 1.75v, CPU Pll to 1.75v, FSB vtt to 1.50v, CPU to 1.45v, sb to 1.175v, etc.
Quote Originally Posted by mach82 View Post
afaik the standard NB voltage for P35 is 1.25V. If so, then over 1.6V is just asking for killing your mobo.
this is madness!! but seriously you'll probably burn up your mobo with 1.6v+, +1 with mach82.

it takes 1.4v for 450fsb, with 4dimms 1:1, Plvl 2 (=8) on my P5K-E. The only reason i cannot go lower is because 1.25v on the NB bugs out and is actually 1.55v.