Don't know what that "Generics" stands for so I'd get this:
http://www.eclipsecomputers.com/prod...de=GCA-XR785D2
or this:
http://www.eclipsecomputers.com/prod...de=GCX-XR785C2
or even this with Dirt 2 showdown coupon:
http://www.aria.co.uk/Products/Compo...roductId=50787
It should work with your PSU. By the way, that PC is prebuilt? What brand?