the problem seem to be the physics. I can basically run all recent games on high settings. I had the same problem with arkham asylum. in certain areas i had a slideshow whereas the game ran on an average 25 fps. Damn it, i'll never buy ATI again.
personally i don't have anything against ATI. their Radeon 9000 series cards were excellent. but i always go for XFX nVidia. solid cards..solid performance.
The patch doesnt work, if you installed the game into different folder than the default. It also needs about 30G of free space while performing the update. Maybe thats you soulution.
Not true on that other then default part. I have 3 Hard Drives C:
D: and a E: Drive i did not install the game on the default C: Drive i changed it to my E: i also put the patch.exe in that same game directory and then executed it and patch and game are AWESOMELY GREAT.