I just got a new RX 480 and a 144hz Freesync 1440p IPS monitor but when I set it to 144 the screen flickers black over and over in games. Ive tried the latest drivers and am on Windows 10. I thought something was wrong with my GPU so I RMAd it but the problem persists. I also tried the monitor with my old gtx 780 and 144hz works just fine. What is going on?