Enable FXAA in Dx9, Dx10 and Dx11 Games Now by some dude! # Version 9

[kl0012]

It`s hard to see how AA could be implemented on the cpu. Is there really enough bandwidth to shuttle all the frames to main memory and back? Would be amazing though...

It shouldn't be a problem. Lets say one 1920x1200 uncompressed color frame is about 10 MB. So, considering that x16 PCI-e link bandwidth is 8GB/s, it is possible to get GPU->CPU->GPU transfer speed ~400 fps (about 2.5 ms per frame).
BTW, Intel says that using MLAA algorithm it takes to CPU ~4.5 ms to process one frame at 1280x800 resolution and ~9.7 ms at 1920x1200 resolution (probably, including transfer time) and it doesn't depend on the scene complexity.