I have a pc i built 2 months ago fx8350 msi 990fxa gaming mobo and an msi rx480 8g gpu. Worked fine until I started using a 4k display (only game in 1440p). I keep getting a static looking screen followed by a green screen then everything returns to normal. Seems to be random. I've tried reinstalling drivers rolling back drivers removing overclocks on both my cpu and gpu undervolting. Nothing is stopping it. Any suggestions?