Okay, thanks for the advice. I do have AMD OverDrive.
Also, I bumped up my RAMs voltage to 1.9 from 1.8 and now it's working better, but it still BSODs while running FarCry 2 or Crysis. I think it's just because my RAM is really HORRIBLE. Oh well, I'm buying some new 4GBs in a few days. Thanks.