Hi, I have an unlocked Sapphire 6950 that I would like to overclock to 6970's frequencies (from 800/1250 to 880/1375). After some tests with GPUTool and Furmark (the card performed without problems, no artifacts and the temperatures were around 60-70°C) i tried Crysis 2 and appeared a BSoD. Then I did some other tests with: - everything at default: no problems - GPU @ 840, memory @ default: the first time I tried the framerate fell suddenly (to 1fps), then the game ran normally without other problems - GPU @ 880, memory @ default: the first time I tried appeared a BSoD - GPU @ 880, memory @ default and the original bios: another BSoD Now everything is at default (also the bios): What can I do? My card doesn't support the 6970's frequencies? Could it be a power problem? Thanks, Andrea.