So i have left my pc for some minutes and he went into screen saver mode. i pressed a button on the keyboard, and it went back but everything was messed up with full with big pixels and wrong colors (mostly pink). I restarted my pc and everythings fine but this is always happening if i leave my pc for too long. I couldn't upload any pictures because your attachment page is down or something like that... (i got the same error after 3 trials).
I hope you can help me here.
Oh and my drivers are up to date, I checked today.
Radeon HD 6700 Series