I recently upgraded from a RX 580 8GB to a RX Vega 56 8GB. I have my gaming PC hooked up to a TCL 4 series 65" 4k TV via a Pioneer VSX-LX301 Elite receiver. Prior to switching from the 580 to the Vega, games played, just not great/good at 4k. Now that I switch, games are playing much better, but every so often I will get a black screen, like the video just cuts out. I still hear the audio, but no video. It's like a second or 2 that it happens. When the video comes back on the HDR icon flashes on the screen, so I don't know if it's switching in and out of HDR or what. I disabled HDR in windows, but it was still doing it. I haven't tried disabling it yet on the TV yet, but just seeing if anyone else has run into it. I have used the Driver Uninstaller program to remove all vestiges of the RX 580 and re-installed the same driver version and the latest driver version and there doesn't seem to be a change.