Hello, so I did a build for my friend who now currently has an EVGA 660 ti 2 GB, and he loves it. But today he told me that he "Wants higher performance" so he is planning to upgrade. Would it be better for him to get another 660 ti, and do SLI, or just get rid of his current 660 ti and get a 770 instead? (Also would his Antec EarthWatts Green 650 Watt be enough to power 660 ti SLI? Or would he need to upgrade his PSU as well?)
By the way, should I have posted this in the PC building section?