You're having an ASUS mainboard, too. So BIOS should look pretty much the same. What I did is going to Advanced/System Agent (SA) Configuration/Graphics Configuration. There i set Primary Display to "Auto" and iGPU Multi-Monitor to "Disabled". Not quite sure if that really disables the iGPU but this setup made my machine run glitch-free again. Good luck!
Could you post an archive containing '/clover/acpi/patched' folder and your 'config.plist'?
I have problem with my hd 5770 and Night Shift. Downgrade at 10.12Both systems upgraded via Software Update.
No problems.
View attachment 244494
View attachment 244495