When I uninstall the AMD video driver the issue goes away however I'm unable then to play games using a generic driver. The MB is a ASUS B450F. GPU is ASUS STRIX Vega 56. I have reinstalled windows and uninstalled and reinstalled all drivers in different order etc inc only installing the AMD video driver and nothing else. I do not have an issue when running Heaven Benchmark software and the problem disappears when I reinstall my old GPU RX290. Any advice appreciated.