I run a dual screen setup from my ATI 7850, one monitor connected via DVI and one via HDMI.
Whenever I just use the DVI screen and have nothing plugged in to the HDMI output, there is a lot of display glitching, and whenever I try to do anything intensive (if you can call playing a YouTube video intensive), the display completely glitches out and becomes a scrambled white mess.
This problem goes away if I uninstall the 7800 series driver and use the Windows basic driver but this is obviously not ideal. I've tried a lot of versions of the driver with no luck.
I am running Windows 8.