I just got this (http://www.newegg.com/Product/Product.aspx?Item=N82E16817182200) PSU and now my computer is randomly shutting down. So far its only when gaming. I have a GTX 660 ti, i3 2120, 6 gb of ram. 630 watts is surely enough power. At first it was only skyrim, now its Rising Storm and Arma 3. So I know its not just the game itself. Please help.