My computer is 24 hours Prime95 stable, can do 20 passes of LinX, and run hours of Heaven, Valley, or Firestrike.
I have been getting BSOD 124 for a few days now. Reading it may have been the latest Nvidia Beta 326.80 I installed 320.18 which I had good luck with in the Beta. Just now, I got BSOD 3B. I have read other people are having issues as well, game freezes, BSOD, lockups. Anybody else that is having issues care to post? Maybe we can bring it to there attention.

ASRock Z87 Extreme9
Intel Core i7 4770K @ 4.5GHz
GTX680 SLI (Disabled till official support)
EVGA SuperNova 1000W G2 PSU