I have 3 x 2GB sticks of Corsair XMS3 DDR3 1600MHz RAM installed in my system. I just realized my mobo was only recognizing it as DDR3 1066MHz. I fixed it in the BIOS, and rebooted thinking everything was fine. Well, I go to look at some videos at GameSpot and when I watch the videos regularly (not in full-screen) it runs perfect, however when I go full-screen, the video gets really choppy. What would cause this? The only thing I change is the DRAM frequency to 1600, should there be something else that I should change?