I just got the acer XR341CK + amd R9 fury nitro the monitor came with a displayport cable. I plugged it in and all seemed fine for a bit but then it's started just turning completely black then coming back on (Power light doesn't turn off so it's just the display). then it was flickering lines/bars across the screen randomly. I switched to a different port and it got worse (bars were coming up and popping). I had the monitor set at highest res, 79hz refresh, and freesync enabled. Now that I have the hdmi plugged in it's fine at least for the moment.
Seemed like it only started after I opened up a game. Then even if I exited the game it kept doing it. What could be the issue? Thanks =)