Im wondering if you could tell me if this psu will run a 6600gt and then later on a 7600gt or a 7900gt, It comes with 1x PCI Express and I think the 6600gt doesnt need it only the 76 and 79, Any help would be great http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=1273332&Tab=0&NoMapp=0