@Mazty
More games running in 4k with GTX 680.
http://www.eurogamer.net/articles/digitalfoundry-vs-4k-gaming
Battlefield 3 = Similar performance than console version
Crysis = stunning, smooth 4K experience
Need for Speed: Most Wanted = 4k with 30 fps
Batman: Arkham City = look stunning
Conclusion: GTX 680 can handle 4k games.