'tis now september 2018, I am experiencing the exact same issue with a Samsung 55" 4K TV, and a GTX 1060 on the other end, running at 60hz. I documented myself about the issue, browsed the web for a solution, but no one seems to have it. I have tried everything people said(in this thread and others): mess with tv settings, mess with pc settings, mess with nvidia control panel settings, change color settings, change the cable, change the inputs, update the gpu drivers, roll back the gpu drivers, reinstall windows...every imaginable thing and it is still not working. Even while running the tv at 1080p it would still flicker, just like it does at 4k and 2k. Funny thing is, it worked perfectly fine, absolutely no issue what so ever for the first 2 weeks, and then, one evening, it just started flickering. Now, after about 2 weeks of trying to find what is causing it, I am even more confused. I was not able to find ANY viable solution. I really do not know what the problem could be, hardware or software. Just like everyone else's PC/TV who posted about this issue, mine work just fine. PC works perfectly and the tv does not flicker while doing other things. Tough luck, I bought the tv with games in mind, but its way too distracting.
