HI, I think I am having issues with both of my 6870's. About a month ago I had my first black screen while watching youtube videos. The sound keeps on playing from the videos or games for a few seconds and the fan speed on the GPU goes to 100%. I then tried playing some games and the same thing happened. So then I decided to try each card individually. But the same problem occurred with both GPU's. I did a clean install of drivers but the same problem persists. Is it safe to say that both cards are dead? I am now currently with the onboard graphics and there is no problems. Thanks in advance.