So I recently bought the ASUS VG278QR, and I'm currently running it at 120Hz (I'm not sure why I can't run it at 165Hz as advertised but that's not really the issue I'm most concerned with at the moment). However, whenever I'm playing games like League of Legends or Overwatch my display turns black for roughly two seconds, and then turns back on. My first thought was the GPU, I have a Raedon RX 580, but it's up to date and according to my knowledge (which is very limited, so I could be wrong) the settings I'm running on these games shouldn't be an issue. It's not a loose cable, and I've tried multiple different HDMI cables. Plus it isn't random, it often happens when I alt-tab out of games and it happens more often with more graphically intensive games, (and for some weird reason it happens a lot when I open the buy menu in League, which is strange). Any idea what the issue is?