GTX 770 Windforce 4gb won't POST

Aug 15, 2012
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My system won't even get to BIOS with the 770 installed. The card replaced a 7450 and a 3870 which both worked fine. At first I thought it was the PSU which I used 4 molexs to the two 8-pin connectors. Since that I have gotten a new PSU. Still won't POST. Could it possibly be the motherboard? The card is fine as I tested it in my friends PC and worked fine.

PSU http://www.newegg.com/Product/Product.aspx?Item=N82E16817182072

Full Specs (Apart from PSU which I replaced as soon as I got it then again with the Rosewill)

What could the issue possibly be?