Cranking the Anti-Aliasing Post (FXAA) filter all the way up to High does very little to performance, though it also affects image quality in a different way than MSAA. Because the penalty it exacts is so minor, though, keep Anti-Aliasing Post turned on all of the time.Be more conservative with the Anti-Aliasing Deferred option, turning it on and up only when you have the performance headroom to spare, ensuring you can maintain playable frame rates.
