Quote Originally Posted by Roch View Post
I got 2 Palit 580s installed, the stock vid is 1000mv. I can only get to 850core (memory not touched) at 1100mv, anything higher and it crashes Heaven 2.1. Any advice? This is in a case, stock cooling, with a 1200rpm 140mm fan blowing in from the side panel, I'm after safe 24/7 stuff btw.
you have to go higher than 1.100v+85% fan for 900+

you have to touch memory (1100-1150mhz) if you want higher performance higher core voltage helps with that too

~1.125v 900/1800/2200 safe 24/7 stuff

then again "safe" is in the eye of the beholder

good luck!