I'm using a Radeon HD 5570 on my computer currently. This card is capable of running most games I play just fine. I can run Left 4 dead 1 and 2, Mass Effect 2, Battlefield 3, etc, all on maximum settings and the framerate stay in a very playable range of 25-48. But this game I'm lucky to get 15 frames in some areas, even with low settings and compatibility mode turned on.
What gives? Why is this game so difficult to run when other higher-graphic games work just fine on my card? What can I do to fix it and make this game run smoothly?
Where do you live? It may be the servers.