Massive random frame drops

So since six month i experience random frame drops. I start a match with like 80 - 110 fps, depends on the map and how much players and stuff is shown.

Then first thing is the fps drop down to 12-20 randomly in the match. They stay that low.

Second thing that can happen is, the match runs at 80 -110 fps without any issue and then as soon as i am back in the hangar, the fps drop down to 12-20. If i start another match they stay that low.

A solution is restarting the game untill a frame drop happens again.

Sometimes nvidia updates and game updates can have a positive influence at it, sometimes its gone untill next update and reappers again.