Going from Internal Graphics to Video card? #GPU

Ok So far ive gotten all way to the desktop and ive installed my wifi card and its working great. Im now stuck on what to do to get my EVGA Geforce GTX 650 Ti 1GB Gddr5 to work VIA DVI adapter. In my bios it says

Int graphics is Auto and Memory for it is 64mb.



OS X ML 10.8/ Clover



specs:



i5 3570k 3.4ghz

gigabyte z77 ds3h

8gb ddr3 corsair veng

500gb wd sata





thanks for any advice!!