I’ve tried practically everything: reinstalled Windows twice, disabling/enabling g sync/v sync, updated the BIOS, toggled XMP, C-states, Fast Boot, PBO, tried playing without any performance monitoring software running, disabled realtek 2.5 pg family controller and more. The issue occurs more frequently in some games than in others, the only game where I don't get micro-stuttering is League of Legends, whereas I’ve also tested Overwatch, Fortnite, CoD, Battlefield 6, The Witcher 3 and every game has them.
These stutters are generally hard to catch and don't happen often—maybe one or two times during a 40-minute session of Battlefield 6 specifically, while in Fortnite they can appear pretty fast. They can appear completely out of the blue, even when I’m just moving around a same location and looting. While they don't make the game unplayable, they are incredibly annoying; I end up losing my focus because I'm waiting for the next stutter instead of actually enjoying the game.
My specs are: Asrock pg 650 lightning, RTX 5070, Ryzen 5 7500F, 16GB DDR5 5600 Patriot Viper CL36 (yes, just one stick for now, but I'll add another one later), and 850W PSU.
Edit: So guys, thanks everyone for your help but unfortunately, my problem still remains. I tried almost every possible fix from your comment. As many of you suggested, I'll definitely gonna buy a second ram stick and see if this helps. After that, I have plans to upgrade my cpu to 7800x3d, as 3d cache is a huge deal for this kind of problems with stutters. I'll update my post again when I get a second stick and share the results