So mere GPU and CPU pairing is not enough
Atm, I have i5-6600K with GTX 1060, with a 1080p res. monitor. As of now, all the games I have tested, (BF1, CSGO, Minecraft,) seem to run just fine at maxed out settings.
At 4K res. in BF1 set in the options, my FPS takes quite a dip below 60...