Currently running sli gtx 275's, cards are xfx 640mhz core clocked models, (ran at stock), thinking of moving to a single card, (470 gtx, with sli option later when prices drop) Would i notice much of a difference? After selling the 275's it would be a pretty cheap upgrade, gaming at 1920x1200 on a 4ghz i7, im thinking that ill maybe see a better rise in minimum fps in all games, the current sli setup is prety good in games that utilise sli. Also, would a corsair hx 850w power gtx 470's in sli, rest of my rig consists of 3 x 7200 rpm hdd's, xonar dx pcie soundcard, fan controller and a blu ray drive.