I’ve run into a similar issues, after switch from my intel machine to my AMD machine (i5 13600k to ryzen 9 7900) because I wanted more threads since I wanted to up the ragdoll count to 75 or 80 I ran into severe stutters.
Another thread ( SAM causing massive stutters - #18 by xeonzs ) makes me think it’s specifically related to AMD CPUs (since I run both machines with the RTX 4090, depending on which one I’m using).
With the intel i5 I had no issues with transistions during loading (smooth), less FPS drops and especially no GIGANTIC stutters (would sometimes drop from 160-220 to 6-8 fps) for a few seconds when looking in a specific direction, one time it got so bad my whole system was becoming unresponsive and this only happens with Darktide, and only after patch 13/14.