maybe your ddr5 ram is the key because the video shows DF having the same issue with a 4090 and a 12900k.
full game. all footage in the video is from the base game. this is an issue inherent to their asset streaming. it is not shader stutter since it continues to happen even after you enter an area for the first time. its not quite traversal stutter because even though it happens when you enter a new area, it can happen at any point even when you are walking in a hallway that has already loaded. you can see that in the video as well as he chases an enemy and the game randomly suffers a massive stutter.
only other game that has stuttering this bad is star wars but only in the koboh town. the rest of the game is fine. whereas dead space has these spikes literally every 30-60 seconds. you just never know when they pop up.