I just upgraded from E6600 at 3.6Ghz to Q6600 G0 at 3.1 Ghz.

I can't get stability with Q6600 any higher than 3.15 Ghz (350 FSB) no matter what settings I use in the bios.

My P5WDH is the old model (1.65v MCH) with 2206 Beta bios.

Any suggestions welcome.

By the way, the 8x multiplier doesn't work. Not that I care about that.