I recently got a new 560ti to run with my second one in sli. I have been having an issue where the screen flickers and I can not figure out what the problem with it is. I have checked to make each of the cards works and that there is no damage to one of the motherboards. I can not figure out what else to try. The problem seems to be fixed when I run it windowed mode. But I would prefer to play games in full screen.