Im having the same problems as you. My asus 6850 1gb suddenly stopped working and said that drivers failed but was able to recover. Before that games such as Diablo 3 were running at 90 fps at max settings 1080p and now its only running at 60-65 constantly dipping below 20 when attacking monsters. I then check in dxdiag and it was saying i only had about 717 dedicated memory. i also downloaded gpu-z which enables you do see your gpu performance, it has said i was only using 710 memory while running diablo 3. I really hope my graphics card isnt dying so soon. just bought the darn thing.