Lately I've been having these very short fps drops. It happens about once a minute. Fps goes down to what I read as 20, feels like 10 or lower. Then back to 60 (my standard fps) for a second. Then small drop again. Then 60 again for a second. Like 5-6 times, then it's over. One minute later, same story. The drops take about less than 0.5 second.
It doesn't sound like a big deal, but basically it means that I'll be unable to rail for about 6 seconds every minute. Also all other guns/dodging goes quite bad during those drops.
You can see it for yourself in the demo. Right at the start, and at the end (when I start clicking 'no item to use').
Does anybody know anything about this, or a way to fix this?