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