Ok sorry if this question was asked already.
Just installed a evga 660 ti ftw sig 2 on to my z77 extreme 6 with a i7 3770k processor and 32 gb of ram (it was gift ram) also have a 850 watt psu.. My old video cards (pny 7900 gs sli'd) worked fine and onboard as well before new card. Uninstalled...