I recently bought a 28" 4k monitor to run on a GTX 1080 GPU I found it performs better than a 1080p monitor for some strange reason, however I running it 2k resolution which works really well, 4k will kill your frame rates for little gain.
I recently bought a 28" 4k monitor to run on a GTX 1080 GPU I found it performs better than a 1080p monitor for some strange reason, however I running it 2k resolution which works really well, 4k will kill your frame rates for little gain.