barto :
Are you sure the issue is the GPU? Can you list out your entire build? (Make and models please).
Motherboard: Gigabyte ga-z77-d3h rev 1.1
CPU: intel i7 3770k 3.5 ghz base (3.9 turbo)
SSD (Boot drive) : samsung evo 850 evo 500 gb.
Secondary hdd: Western Digital 1 tb caviar blue
PSU: Corsair hx 850
case: Phantom NZXT full tower
Ram: 16 gig (4x4gb) Ripjaw X
GPU: MSI twin frozr gtx 770 2gb