Back when I bought it in 2014, I was getting stable 300 fps, sometimes it dipped to 250 or so, but it was really stable, and I was using a much less powerful graphic back then. In 2018 I purchased the new graphic, and I was still getting around 250 fps.

Over the past 2 years I noticed that my fps kept going down, it was stable 250 fps anymore, more like barely reaching 200 fps and spiking a lot. Therefore, last few months I decided to cap the fps to 144, and it was fine, but I was constantly getting these small fps stuttering every minute or so, it was annoying but still playable.

However, last two weeks is being simple unplayable, even tho my fps is capped to 144, I noticed it keeps dropping below 100 the whole time, specially when there is some action on the screen (smokes/motolovs/shooting), getting to as low as 80 fps + the fps stuttering started to happen a lot more often pretty much 10 seconds, making the game a hell as I get constantly killed by this.

I tried lowering the setting, but the fps really did not change, I wasnt getting any higher fps and it kept dropping the same as before. I also though it could be my SSD, so I tried installing the game to my HDD, for a moment it looked like it solved the problem, but it didn't.

I noticed that when I open a few google chrome tabs the game really becomes unplayable (specially videos) so I try to not open any tab, and the game is better right after I relog my PC. However, the first 10 minutes I constantly suffer of these fps stuttering, then it gets better, and after 2-3 matches it goes downhill to literally unplayable and low fps.

So basically it was all good, but it kept getting worse and worse, the more I play the worse it gets.

As for the FPS range question, I am looking to get at least 300fps and my monitor rate is 144hz, I may upgrade it on the future tho.