Ok, so I took the old vido card out and stopped running crossfirex, didn't notice a big difference anyhow. The other card is running everything smooth, and no issues with WoT, AH, or any of my other games. But it still locks up now and then. Have I gotten 3 bad video cards, or is there a software issue? The inside of my case is always cool, plenty of air moving through it. I keep my fans relatively clean. I am starting to contemplate wiping my HD's and starting over with a fresh install of windows 7. Could it be an issue from upgrading vista? Also, my wife has had a similiar issue with her computer. But her's was solved by using an admin account.