Hello there Neowinians!
So I have this mid 2011 21.5" iMac for about 4 month now and had absolutely no issues at all. Yesterday I've been playing Driver: San Francisco via BootCamp on the Windows7, and after playing for about an hour, screen started to show me pink splashes and lines. I've immediately alt-tabbed and started to check for the GPU temps via AtiTrayTools. The temps were pretty ok to me (68-70C). When I got back to the game, splashes were gone.
I started to search the web for any GPU issues on the latest iMacs and didn't found anything similar to the issues I have.
My GPU is 6750M 512MB.
I'm not a huge gamer, but last week I played Gears of War co-op with my mate for about 4 hrs and didn't had any problems.
So anyone heard about issues like this? I'm going to look maybe for different drivers today and will try to play again