I have a sapphire 5870, and sometimes when i play Starcraft 2, game works fine, but other times i will be playing, the game will stop, screen goes blank for a sec, turns random colors (all tan, all black, etc etc) then it will go abck to the game like nothing happened. I also Play WOW and i never had this issue, running WOW at ultra setting. Does anyone else have this issue with Starcraft 2 with this card?