Anti-Aliasing drastically decreases your fps, however I use 2x Anti-Aliasing because the game looks a whole lot better, any more than that is overkill for me. I use Very High texture settings, if you have a lower end PC maybe you could set it to lower, however for my computer it seems to improve the fps for me, think its something to do with the computer not having to handle compressing the textures, you can prove me wrong though.
