I have an i7 4770K, 970 & 16GB RAM
I was having crappy FPS (20-30) in Cacauses Map in 2.5 (No problems in Nevada or Normandy).
In another post someone said turning MSAA on to 2x and then setting FXAA in Nvidia Control Panel worked so I gave it a shot.
I'm now getting minimum 45 fps. Not sure why it works but it is for me. Before 2.5 anytime I turned on MSAA my frames would die.
Worth a try anyway. And it looks way better with the AA.
In game
Deferred Shading On
MSAA 2x
AF 8x
All Shadows Flat
In Nvidia CP
AA Mode to Enhance the application settings
FXAA 4X