Need help with New Build

So I put together a new build and am having an issue with my graphics card (XFX 7950 GHOST). I installed windows 7 and after installing 12.6 drivers I get amd display drivers have stopped responding constantly. I returned my motherboard due to a couple of dead dimm slots and am hoping this may resolve the issue (maybe there were other issues in the board the caused my graphics card to malfunction). I am reinstalling my motherboard today and if the problem persists I am going to return the graphics card. My question is there anything else that could have caused this error? Also I know its not my psu because its a corsair 850 watt silver series and should be able to handle my build.

Build
Motherboard: Asus P9X79 Pro
CPU: i7 3820
RAM: 8GB of GSKILL 1600MHZ
PSU: Corsair Professional 850 Watt
GPU: XFX 7950


Here is a link to the gpu I bought.
http://www.newegg.ca/Product/Product.aspx?Item=N82E1681...