Im having some annoying problems with my new built sandy bridge system. I have a powerful watercooling connected to it so its not related to temperatures.

Whenever i go above x42 multi and i start prime95 it will drop back down to x42 after about 10s. Right now im running prime on 4,2ghz 1,25v and hitting 43C and its working like a charm. But if i run 4,3ghz with anything from 1,25v to 1,45v it will still drop down to x42 after 5-10seconds..

I have a 2500K and a Asrock P67 PRO3.
I have disabled the stuff that is mentioned in the "guide" (http://www.xtremesystems.org/forums/...02#post4697802) and all other voltages are untouched.
Any idea on what it could be?