I havent had a to really check it out with my 660 SuperClocked though it ran pretty smooth. Hard to tell atm cause I think my 660 is dying on me 
so I am trying to prolong it as long as I can cause with UE4 open for more then about 5mins temp starts getting to 90-100c and I don’t have a replacement until the Titan X comes here drool if you want though add me to Skype user name on there is Keiyentai and I can see what I get for a simple scene and make sure I have it set up properly. Pretty sure I did but like I mentioned not a programmer really.