I’m having Video card problems with my new 7900 GT’s. It seems one of them is messing up, but I can’t replicate the problems I have when in single GPU mode. When I’m in SLI mode, however, it appears that the card rendering the top half of the screen (when in split frame rendering mode) is messing up. Does anyone know which card is responsible for that? Is it the main card, or the secondary card?