I have two GTX 285 OCX and recently I've been having a problem where the graphics will pause for a second or two and then go back to normal. This usually happens after playing for a few hours. Today, that same issue happened but instead of it going back to normal, I got some seriously bad artifacting and there was gray all over my screen and I could barely see anything. Once I rebooted the game, the artifacting was gone, but I still get the hiccups with the graphics. I know I have enough power for the cards but could this be a cooling issue with the case fans? I use air cooling and I have 4 fans.