i'm getting some TERRIBLE frame drops! if i run it normally, it starts with a framerate around 30 and gradually lowers. degrading the resolution to 1366x768 allowed the framerate to stay at an even 60 but quickly dropped when the title made its appearance. exclusive fullscreen mode & 1366x768 made it run smoothly enough for me to enter the game and get a feel. about two minutes later, a quick steep drop from 60 to 5 in a matter of seconds. help me out?