The first benchmark just got released: http://www.pcgameshardware.de/Fallout-4-Spiel-18293/Specials/Test-Benchmark-vor-Release-1177284/ If CrossFire works, i would be happy with the performance. However, Some Nvidia card seem to perform better than i you would expect. If you look at the results of the 1080P benchmark, you can see that the performance of the Fury X and the GTX 780ti is nearly the same and that the GTX 770 is 6 procent faster thant the r9 290. I must say that i'm not even suprised anymore. * Please note that they did the benchmark with god rays set to high instead of extra. Extra uses Nvidia Gameworks. Nvidia users will take a huge performance hit if they enable it. I cannot imagine the performance on AMD hardware.