Hi . So recently, I built my own gaming PC, and I bought an XFX RS RX480 8GB gpu. I also have an AOC U2879VF 4K Freesync monitor. And I wanna play games at 4k. But, whenever I try and run a game above 1080p, the screen goes black and flickers in and out. I can still hear the audio coming from the game through my headphones, but the display output just isn't there. I've personally never seen this happen before, so I'm kinda guessing as to what it is that's causing it. It's not a driver thing, I'm running the latest ReLive drivers and I tried on older ones as well, it did the same thing. If anyone can help me as to what's causing this issue, it would be greatly appreciated.
PC Specs (just in case you wanted them):
6700k oc'd to 4.5ghz
Hyper 212 Evo
16GB Corsair Vengeance DDR4-3000
EVGA 650W PSU 80+ Gold
ASUS Z170-E Motherboard