I have an Asus GTX 570 direct asus gtx 570 directcu ii on a gigabyte z77x ud3h. I want to put in another gtx 570 so i can run it in sli.. however, the only problem i find is that the asus card is too big!! it takes 3 slots.. i was wondering what i could. Like buy another brand for example a gigabyte 570 on the top and the asus one on the bottom. Also my psu is a corsair 750w 80+ bronze. Would that be enough?