Sudden FPS drops every minute

Hello,

I uploaded a video about the problem i am having. Basicly every minute or so my screen freezes for like 300 ms and continues normally. My fps counter goes ffrom 180 to around 130 but it is not simple fps drop it actually seem to drop to 0 fps for a moment and continues on normally. It doesn't seem like an internet problem but more like fps problem.

I am using GTX 1070 graphics card and my cpu usage is around %20 when using wow.

Here is the video(Please check the 27th and 33th sec of the video):

https://youtu.be/swEomZQezXI

Try downloading and applying Large Address Aware to allow WoW to use more RAM.