ok i just redid my entire sys. Asus Nforce 4 SLI mobo 2x 6600GT 128 MSI 2gb XMMS mem. 4x 120 WD SATA. and windows XP Pro Legit and activated. all drivers up to date. all windows up to date. even tryed the beta drivers its perfectly fine when im in a game it flawless and all but when im in windows and im watching a vid that is more than half the screen and i click on the windows button it is very very choppy video. or when a bubble tool tip comes up or anything its very very choppy. but when i turn off sli it is perfectly fine. anyone have this problem or know anything about it??