Forget the 1080 ti , when it releases the chances are the standard 1080 ' s will drop in price , I run two in SLI right now and play everything on ultra at 60 fps on my 55 4 K Sammy in my man cave . Only thing I turn off is anything and everything to do with AA , MSAA , TXAA , FXAA as its simply not required at 4 K as there are no jaggies edges at that res . The extra wiggle room your gpu has not rendering those post processing effects help maintain that rock solid 60 fps too . So go with two 1080 ' s chances are two of them will cost about as much as one ti . One ti will not be as good as two 1080 ' s we ' re talking a ti ' s 10 . 8 Teraflops specs leaked vs SLI ' d 1080 s 18 Teraflops and a price tag of a $ 1000 for a ti vs $ 500 dollars apiece for the 1080 ' s . So for the same money you ' re getting almost double the computational power . As anyone who knows anything about SLI , no you never get double the performance from adding a second card , but even 1 and half 1080 ' s comes out at 13 . 5 teraflops compared to the ti ' s 10 . 8 so the SLI ' d setup is more or less an entire PS 4 and then some power on top of the ti ' s . There ' s obviously many factors to take into a count but basically I ' m saying , don ' t just automatically drop a grand on a ti , it may not turn out to be the best investment when prices start tumbling on 1080 GTX ' s .