I played around w/ 3.6ghz, but honestly don't remember the voltages.

I'm prime stable @ 30 minutes (which is NOT technically stable, but looks like it will be fine) @ 3.7 ghz (411x9)

I'm running 1.5175 in the bios, 1.4720 via AI suite.

I've run 400x9 with almost everything on auto and i booted 3.6ghz to vista. You can see what vista reports, then just drop the voltage till you are not prime stable/can't post.

Hope this helps...