ps : its the same in every game.
i have an old (4 years old) alienware.
anyway i didnt check inside the computer yet and you all seem to say thats where the problem comes from so...
no its not overclocked and thx for the reply i'll return it then.
i'm totaly lost, i ve instaled lots of different catalyst to try to get rid of those glitch squares but i still have them.
and i really...