What's your GPU and driver version? Also, are you using an LCD/LED flat panel monitor, and does it connect via DVI or VGA?
M using GTX 560ti
Diver version 310.54 (Beta) Windows7 32bit
I jus downloaded this driver today
My monitor is a 1280*1024 res Flat screen....its pretty old so m sure its not LED or sumtn...jus a normal LCD 5:4 aspect ratio with 1280*1024 max (native) res.