I have not overclocked or made any adjustments. I was racing with all video settings maxed on my new 512 mb HISx1950pro Ice-Q-3-Turbo, everything was great and then the screen got corrupted slightly(a bit of snow I guess). I was able to shut the game down and restart windows, and the snow is gone. It's my 1st time using the card. Just wondering what that could be? I'm going to go try to race again. Back in a few.