I believe you should probably correct a previous statement EastCoastHandle.... It is incorrect to say there is no difference between Enthusiast mode in DX9 and DX10. Everybody that reads about directX software knows DX10 has the "Godrays" from the sunlight and dynamic lighting in a superior way in Crysis. There is a difference. You may not think the difference is worth the performance hit, but it is a difference resulting in higher Quality.