Yesterday, I had my 5870 at 1000 core and 1300 mem and 1.225v core voltage. I could run any of the 3D tests for as long as I wanted. Today, it seems more unstable, those same tests crash, and sometimes they work. GPU Burn-in crashes on all of the Open GLs, and Direct Xs. How do I proceed? I want to keep my core and mem clocks. Do I increase core voltage? Decrease core voltage? also: when I set the core voltage to 1.275v yesterday, it was unstable, but 1.225v seemed to be fine.