After you load the game and before you select continue mission.......... there's option for video somewhere. Vsync may be on in there. Also your hardware isn't good enough to crank the settings up that high........ maybe at 1024x768...??
After you load the game and before you select continue mission.......... there's option for video somewhere. Vsync may be on in there. Also your hardware isn't good enough to crank the settings up that high........ maybe at 1024x768...??