I can play games like skyrim on best graphics without lag. But toribash is badass, i don't played toribash, half year ago with XP windows everything was okay.

Thing is - then i turn on toribash, there is no lag even on maximum graphics. But. After playng about 10minutes, it starts to lag, desktop gets black then everyhting is back again and running colours are weird. I have to restart my computer. Amd graphics driver crashes. Dafuq. It was updated week ago. Also i have games like:
Gta 4,
Minecraft,
TeknoMW3 (cracker mw3 online.),
THSV Skyrim,
Wolfenstein enemy territory,
Prototype 2.

Everything is okay... Pls help.