I have installed Batman: Arkham City on the computer of mine. Also I have installed DirectX 11. The game is running smoothly till the DirectX 11 is turned off on the computer. however as I am turning off the DirectX I am getting 15 to 20 FPS. I donít find out any reason to figure out the root cause of the problem. So tell me if you are having any idea on this particular matter. I am waiting for the prompt replies on this particular matter.