Hi, I'm having an issue that has almost conflicting parameters.

Every 15-30 seconds or so (though it can be every few seconds or once every 10 minutes) my FPS will plummet and my CPU usage will suddenly drop dramatically. This is confusing to me because I'd think that normally FPS would drop when resources are capped out, but apparently not.

I'm on Windows 10 64-bit and this has been going on for about a week. It isn't game specific, though I've only tested on Dota 2 and League of Legends, I don't think it's an issue with the programs. I've attached a screenshot of Dota 2 with the fps shown and Task Manager's Resource tab. The fan also goes crazy, which doesn't make sense since supposedly the CPU is being used less.

I know this probably isn't a lot to diagnose off of, but could I have some tips for the types of tests I should run and things I should look for?