Quote Originally Posted by mars View Post
Ok I installed it last night on my current rig which is 3930k@4.6GHz and 290x @1080/1500

As far as I can see my fps is pretty much the same as before... And it might be smoother but really I couldn't tell the difference lol
This may sound dumb, but sometimes we miss the simplist of things. You did close down the game and restart it after enabling Mantle. It's just that your system and mine are fairly close in terms of hardware and I did notice a difference in performance and smoothness. (Except for the odd stutter or pause)