I purchased an XFX 7970 Ghz edition video card and returned it but because there was a slight scratch on the housing they rejected my RMA. I of course am not very happy but fighting this issue has become worthless. So after I returned the XFX 7970 video card I turned right around and purchased the Sapphire Vapor X 7970 Ghz edition card and am very happy with it. But because I cannot successfully return the XFX video card I now own two Ghz edition cards. I am assuming you can crossfire them two cards together but just wanted to get another opinion. I am stuck with it anyways so I might as well have fun with it.
I have a 1,000 watt PSU and the Asrock Extreme 4 Z77 MOBO. I figured it would work but was not 100% because they are from two different makers. Thank you all fr your help and replies. Much appreciated.