This is a heat issue with a poorly installed cooler on the 6800 series cards.
After I put AS5 on my ram I noticed the GPU cooler was very loose. after I tighten it the issues have stopped. Ran 48 hours idle 53c load 79c in DOOM3.
I can run any driver from 61.34,61.76,61.77,65.62 <--- is an awsome driver got it @ guru3d set 2d/3d but runs stable even if they are not the same.