Well, going red for me was the most frustrating thing I've ever done. AMD seems to be ignoring my posts.
Giving another try... Perhaps one noble soul from AMD will be touch and reply to this thread, even if it's just to say they don't know what's going on...
I've been having two issues: "Default Radeon WattMan settings have been restored due to unexpected system failure"/"Application has been blocked from accessing graphics hardware" and this screen flickering/pixelation. The first ones seem to be something related with Windows 10 (PRO, 64 BITS), since it didn't happen on Windows 8.1 (PRO, 64 BITS). The screen flickering/pixelation happens on few apps/games, with any OS and driver version. I simply can't tell if the GPU is faulty or if it's just a driver issue because I can't count on AMD to help.
It feels like they are hiding something from us.
Here's my screen flickering/pixelation on Plex Media Server and Crysis (happens on game intro and game menu only, apparently).
GA H97M-GAMING 3
16GB DDR3 RAM
650W 80+ PLUS GOLD PSU
DELL S2340L 1090p 60hz hdmi
WIN 10 PRO x64