that was 2017 and you were pushing your luck then?
and we have no idea what he runs in the background verses you , plus he actually stated hes using Relive so at the same time as serving the OS and game his HDD and single stick is also getting involved in writing video back to the drive.
and the OP nor anyone else worked this line of inquiry ,instead its PSU's drivers etc etc, freedom had it right on post 2 imho.
Agreed. We don't know a lot of things, I'm just saying, its good to go in depth on the software side before you start looking at hardware, and I say this because I really don't recognize this sort of choppy behaviour from a very similar hardware setup. This really isn't stutter - it is consistent. And that does not fit the lack of RAM situation at all.
Also, december 2017 is just over a year ago. Not that long at all, and I play pretty recent games, and a very broad spectrum of them of which many are very CPU and RAM heavy (=reason to ditch the IvyBridge setup). I really haven't seen a thorough exploration of the Freesync/enhanced sync/what settings are actually active from the OP, and I get the impression something has been overlooked. Its easy to throw more hardware at a problem to fix it, but that doesn't mean you've found the actual cause.
That said, a very plausible cause here is the use of in-game recording software such as relive, that would certainly explain a consistent frametime interruption like we've been able to see.
Last, with regards to the SSD versus HDD situation, yes, this is the most tangible and noticeable performance boost for any system, whether new or 10 years old. But at the same time, the games where an HDD directly impacts frametimes, are extremely rare. With concurrent recording software though, that changes.
@Chippyz I think you need to change your stance if you want to find the cause, stop playing defensive and get inquisitive. Its your issue in the end, and denial gets you nowhere. Explore it - everything you've explored and cannot be considered the cause, is safe to exclude. That will leave you with the solution in the end
I also said that it was happening on a fresh install of windows with no additional programs installed other than the drivers and the game. I'm okay with it as long it's not the GPU causing the stutter(as it's the most expensive component and I don't want it to be faulty). And I had my HD 7950 like 2 months ago and didn't have a single problem with it. And some games were low fps because of the gpu but there was no stuttering at high fps. And the stutter happens in the simpliest games.
This, once again, confirms to me that this is not a hardware problem - at least not one of any hardware except the GPU. The GPU is still suspect.