Originally Posted by Bah!
That's what I've been hearing. Enable it in one or the other, but not both.
Enabling in both seems to double the performance hit. I'm running quite well @ 1920*1080 4XMSAA maxed out, with a few tweaks posted in this thread. I can run 4XSSAA without the fxaa but I like the using it.
I really like using the fxaa way better, it smooths things out quite a bit and takes the edges off the shadows.