hmmmm ok so this is new. artifcats in video playback, and only since updating Mobility Catalyst Display Driver from AMD.

Ive already rebooted three times 😤 They dont show up on the BIOS screen as far as i can tell, only once Windows loads. Is that a meaningful clue? Im happy to run tests, i just need to know which ones make sense. i have not overclocked anything on purpose, but i did install a tuning tool a while back. i wanna rule out the cheap explanations before i start pricing replacement cards.