What monitor do you use? Can you give as full model number as possible so i can look up some specs for it please?
Also just update your graphics drivers
, even if you already have done so, just so i can rule anything like that out. Out of interest, you havent like got any custom settings for your graphics card in game or anything through your graphics card control panel at all that might be causing issues?
So you know, i dont know whats wrong yet, but im trying to get information to help.