I played for about three hours last night and did not have any freezes or hang-ups. I did however get a BSOD, and strangely it happened as I was going to log off for the night. The screen went black as the game was going to close and then into a blue screen. I checked the error and it was "bug check 0x21 QUOTA_UNDERFLOW" which is one I have never seen before.

I performed another Windows memory diagnostic, which came back with no errors. I also ran prime95 for half an hour last night and no errors were encountered. I will try running prime95 and furmark for an extended period tonight (possibly together). I'll also uninstall 326.80 and give the 326.84 driver a try and then I'll post the results. I'll use the Display Driver Uninstaller this time around as well.