The recommendation of the i5 has waned. That and folk moving to higher graphic monitors other than the usual 1080p 60Hz display which takes yet another bite out of the possible performance.
So to start let's see if there's anything in your Speccy report that may tell us if there are areas to work on.
Share that report here. Here's how:
I have a desktop with an i5, gtx 1080, 16gb of ddr4, all games running on an ssd and am struggling to run games how I think I should. I have had this pc for a year or so without any issues, recently games aren't running well. The wakeup call was modern Warfare. I updated my drivers after struggling to even play. Adjusted my settings according to guides "best settings for performance" Still, it would randomly throttle and just not run smooth overall. I am an avid cs player. I was playing nuke on medium settings with AA off, running 80-100 fps. I should be able to peg it to 144 to maximize my monitor shouldn't I? On modern warfare my CPU usage was like 99%. I closed everything I could to lower it with minimal results. I ran a full scan on windows defender yielding no result for a virus but I feel I must have one. Any thoughts? I just wanna maximize my games and play them how I should be able to.