I have an i7 970 and a GTX 970, i'm trying to play the arma 2 dayz mod and i'm getting a very stutter-y fps. The game will be on 20fps, then 33fps, then 10fps, then 60fps, it just spikes all the time, when i put my settings on the lowest of low, it still does that, and when i put it on the max settings, it still does it, any help pls?