SLI not compatible
I couldn't figure out what was going on but i was playing killing floor with duplicate monitors (two monitors displaying the gameplay). While playing the game when i would look around it gave it a drunk look (see double of thinks and choppy screen refresh). So i disable SLI on my computer restrart the computer then try playing again and the duplicate monitor works fine so if you have any problems while playing KF on duplicate screens just disable your SLI. My system info is attached.