I have the evga 7900 GT KO video card. Its worked fine but up until recently I have been getting artifacting a lot. The main two games it happens in is Oblivion and Dystopia (Half-Life 2 mod, havent tried normal HL2 in a while). The kind of artifacts I am getting are where it looks like the surrounding and character models will "Bleed" a certain texture and it can stretch across the screen and probably into infinity. When looking at certain angles the artifacting will dissapear. Over time while playing a game it will get even worse. I've checked the temperature on the video card and they have been fine(57*C). What could be causing it?