Well most of the time the GPU load scales quite linearly so essentially you need 16 times more power for 7680x4320 then you would for bog standard 1080p. For most modern games with any higher detail level this is simply un reachable. 3840x2160 is much more obtainable as its only 4 times the load of 1080p. For that an single GTX 980 is capable in some games but other heavier games will need two or even three 980 to maintain good FPS and level of detail.
10/24/14 at 7:51am