Hello everyone, as most of you now know, I have been struggling to decide whether I should game at 1440p or 4k with a gtx 1080.I asked around a lot and people seemed to have different opinions.I made my choice and it was 4k, This thread is to help people who may want to decide in the future. I decided to the test the gpu on rise of the tomb raider since its a poorly optimized and highly demanding game.Other games should at least equal this if not better.I will probably do more benchmarks if requested in the future.
Also note that Direct X and some other drivers still need some updates as I just assmbled the pc.

Here are the results(pre OC):

System:

Case:NZXT H440 V2 (4 case fans)

PSU:Corsair HX750i platinum

Motherboard: MSI Z170A M5

CPU: I7-6700K

Cooler: Thermaltake Frio Advanced

GPU: EVGA GTX1080 Super Clocked

Ram:32gb Hyper X FURY DDR4 2400Mhz

SSD:Samsung evo 850 500gb

Monitor: Asus ROG PG27AQ 4k 60hz ips gsync


Game: Rise of The Tomb raider
Resolution 3840 x2160(4k)
Settings: All on High (some can go up to very high and some high is the most)
AA: X2
HAIR WORKS : ON (very demanding)

Results + sample in the link(a lot of image quality is lost, this is just to give you a rough estimation) Screenshots were taken in game by pressing F12 (steam capture)

http://imgur.com/a/W9Xbo

UPDATE:

Overwatch,Talos principle, rocket league locked at 60 fps 4k highest settings.
Ryse son of rome 50-60fps 4k highest settings( no one buy this horrible game,I regret spending 5$ for it during the steam sale, would have been better if I got myself a sandwich)
Nice, one question, do you really need AA with high DPI monitor (4k)?
anayman_k7 wroteNice, one question, do you really need AA with high DPI monitor (4k)?
Not really no. Without AA you cant see any jagged edges from the normal viewing distance. With x2 AA u have to stick ur eyes cms away from the monitor and try looking for an edge and maybe just maybe u will spot any.

With no AA and such a high dpi, the pixels on edges arent meshed together and averaged to try to hide the edges. Therefore u get this 3d feel where u can tell the character is closer than the background, because the borders are so well defined.
The edge of the character's face and the background are clearly at 2 different field depths. This is as good as i can explain without visual aid, I hope it makes some sense.

Out of all the nice things about 4k. This is perhaps what i found is best!!
2 months later
tiny fx wrote
anayman_k7 wroteNice, one question, do you really need AA with high DPI monitor (4k)?
Not really no. Without AA you cant see any jagged edges from the normal viewing distance. With x2 AA u have to stick ur eyes cms away from the monitor and try looking for an edge and maybe just maybe u will spot any.

With no AA and such a high dpi, the pixels on edges arent meshed together and averaged to try to hide the edges. Therefore u get this 3d feel where u can tell the character is closer than the background, because the borders are so well defined.
The edge of the character's face and the background are clearly at 2 different field depths. This is as good as i can explain without visual aid, I hope it makes some sense.

Out of all the nice things about 4k. This is perhaps what i found is best!!
Makes perfect sense since that's how it felt like when 1080P came out . IT'S 3D ! :p

Good to see we got a single card that can handle 4k now.
For 4k it is still out of the league now better to get the 1080ti , I will wait for vega or volta by that time Asus will release the 4k 144hz monitors. 4ks with HBM 2.0 will benefit from the high memory bandwidth on higher resolutions plus Upcoming AAA releases are very demanding look at Deus Ex: Mankind , Assassin Creed Syndicate , Quantum Break ... They barely hit 60fps on 1440p. Reason two still even with Pascal Nvidia didnot implement a new architecture for A. Sync Compute as more Direct X 12 titles will be released + 4k it will drag performance now , yes it is much better than Maxwell but not a good option for the long run. Vega / Volta will adjust things up and I can analyze that the upcoming 1170 ~ Pascal Titan X performance , case simlar to 1070 and Maxwell Titan X @ sub 600 USD.