For a good while, the performance of the game was perfectly fine except of course lag. Starting today though the game is stuttering quite a bit. This happens especially in Rimmen but I have found it to happen everywhere now when running around.
Symptoms:
1) High cpu usage spikes
2) High disk usage
3) Lowering graphics to minimum makes no change
4) Standing still can still cause it to have issues but repeatable when running out of the area and back in
5) GPU usage down
6) Memory usage down
7) ReloadUI causes CPU to run at 100% and makes the whole computer stutter
Stress tested hardware and its all working. Tested changing game settings in Windows and enabling/disabling things for windowed gaming and gaming modes. Added exceptions to windows defender and windows firewall. Tried testing with Administrator and not. Running current Nvidia and Windows drivers. Removed the shader cache for ESO. Cleared out temp files.
Other games have no issues. Other stress tests have no issues. I have narrowed it down to ESO and ESO trying to read/write data on the disk that is causing hiccups due to the CPU having to handle the disk actions.