Hello guys, i wanted to ask if you know why do i get screen of death while overclocking athlon II x4 645 ? I got m4a77t motherboard. With geforce gt 430 i could do some and it took a while till the screen of death but with hd 6850 it takes seconds and systems crashes. I've tried checking some guides but im not good at it and btw overclocking video card worked just fine. There are OC profiles in bios, if i set 2% i can work on windows for two minutes if i set 5%+ windows crashes once they start loading.
I also got FPS 500watt (good quality) so power is not the issue.