When I log in to AH my system loads everything and I get a 75fr(which is what I used to get all the time with everything except self shadowing) it will stay that way for a few minutes and then for some reason drops to between 9 and 15. I have turned everything(graphics)down or off and still have the same problem. I log in play for a few minutes and blammo...fr drop.
So I'm wondering is my card going out? I played fallout recently and it ran fine for about 10 minutes and froze(which never happened before). I Played mass effect and it froze after about 5 minutes. These games freeze with a red checkerboard and my system locks up, but AH never freezes, I just lose FRs.
I was talking to a squaddie and he had me run a scan and try a different antivirus(which sped up my computer a lot) but AH still giving me issues.
Is it my card?

I can watch videos fine, browse fine, but anything graphic intense seems to fail after a few minutes. The red checkerboard freeze makes me think its my card. Could it be a driver issue? I run an nvidia geforce 8600gt and it ran AH flawless even after the latest patches, but I have been away from the game for a couple weeks and now this.......any thoughts?
Is there any way to test my card?

Thanks for reading
Lagger