Hello, I have a BFG 7900GS. I am getting some significant artifacting in Call of Duty 2, not only that, but the game continually locks up. In CSS, several times (though rarely now) I am getting artifacting, and lockups. In TF2, I am getting common lockups for 1-5 minutes. I have reinstalled the drivers twice, used old drivers, the latest drivers, etc etc. My system is not overclocked, and is completely stable. Is this a defective card? Is there anything I can try to do to fix it?