certainly then, it is possible that pc probe could just be buggy. i haven't personally seen any of these crazy voltage spikes in my bios or everest. mind you I cannot attest to what other programs people have on their computers that could cause conflicts, but i avoid that one like the plague. do you see the voltage spikes in everest?

As for the comparison between a p5k and this board, i had a black pearl and it was cooler for sure but it didn't have the extra x16 slot and in general used less voltage. i think that the heatsink design on this board is a little ineffective when not used as intended, ie a WC rig.

also what do we believe? extreme tweaker or hardware monitoring tool for our volatges? its a little rediculous that we cant rely on what the settings are potraying.

as for your quad, this may make you laugh, but have you tried reseating the hsf? also, what bios are you on and what gsf are you using? forget that, ultra 120, try taking the pull fan off, this can cause probles sometimes. i tried it myself and it wasnt very effective.