BF4 Fps drops from 144 to <60 after ~20 minutes

by RoyaalDutch
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BF4 Fps drops from 144 to <60 after ~20 minutes

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As the title says I have massive FPS dropps on BF4 after about 20 minutes. However it is only in BF4. I have a 144hz monitor and my frames go from being capped there to around 90, to 80, to 60, to 30, and so forth until it is unplayable. I monitor all my temperatures and nothing is getting too high. Both GPUs stay below 80 and my CPU stays below 75. I have done everything I can try for crossfire and some other things as well (disabling ULPS, switching slots, trying one card at a time, changing graphic settings [it happens on all settings from low to ultra] disabling power saving options such as C1E and control panel settings). Nothing is seeming to work for me.
I then noticed the other day my graphs in BF4.

This is normal game-play, with V-Sync enabled frames still go up to 155 occasionally but there it is. 
http://i.imgur.com/hmfmb8B.jpg

This is soon after it begins. Pay attention to the graph and the major difference. 
http://i.imgur.com/J4BOMG8.jpg

I am not entirely sure what this means or how to fix these FPS drops but any and all help is appreciated.
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