techreport的:The originally shipped version of this game can take advantage of the Radeon HD 3000- and 4000-series GPUs' DirectX 10.1 capabilities to get a frame rate boost with antialiasing, and as you may have heard, Ubisoft chose to remove the DX10.1 path in an update to the game. I chose to test the game without this patch, leaving DX10.1 support intact.