My PSU is a Corsair HX1000
I have tried both DDU and Windows Reset to no benefit, as for what I haven't changed is just a couple secondary HDD and SSDs I still have plugged in (I only use these for video/audio files and stuff like that, all my games and windows itself are installed on newer SSDs)
The stutters are the same the whole time, some games don't stutter and others do, I don't quite know what makes it happen.
The average load is at minimum 75% and maxes out at 100% (the ram and cpu don't go higher than 40-50% most of the time that I've looked)
I've done windowed, borderless and full-screen in all the game I've noticed the problem, some games get a little better in full-screen, others in windowed, so I'm used to checking all 3 options in most games I play.
Whenever I enable G-sync my screen just changes brightness constantly or "flashes" I suppose, I've also not noticed any performance difference otherwise.
I've tired low-latency on and off and it doesn't change anything at all.
I usually have Steam overlay on but it doesn't only happen on Steam games, otherwise I've tried closing all other programs that would have an overlay.
The first thing I did was probably turn on maximum performance, also tried turning it off after in case that would do anything, which it didn't, so I've turned it on again.
I would prefer not to Overclock anything before I know if my PC can even run stuff properly on it's own, I'm not a huge fan of pushing my hardware extra, especially when it isn't working how I'd expect.
I'll take a look at the topic and see if there's anything there that can help as well, thank you.