Hey @traqu , I've reported this before and I have tested numerous configurations including your exact setup.
There's a couple different kinds of stuttering you can experience.
If I were you I would test your temps, average FPS, and 1% lows over the course of 30 mins in different environments on official.
If you want to take an extra step, I believe AMD has a utility to see core/thread utilization.
Often the issue I found with DayZ is that it's very CPU bound, but CPU bound in a specific way.
On CPUs like mine and yours the game tends to core hop, and on top of that, I've never seen DayZ use more than 3-4 cores.
Things I've seen help:
Enable your rams full ram speed
Ensure your CPU isn't in a power savings mode
Reduce cpu load: Reduce background tasks, lower CPU intense settings like object vis, terrain vis, and shadows.
-------- Obviously, this is guaranteed to be your problems or solutions, but again I've had this exact set up ---------
Another thing you mentioned is KarmaKrew, although KarmaKrew is on the more lightly modded side of "modded", it is still notable pressure on your CPU.
I would do testing on official to ensure consistency.