After playing for a few hours, I experienced huge performance degradation in the main city.
After spending some time (about two hours) in the sewers, I came back to the main city and FPS were about 65. Restarting the game brought them back to 100, because I’ve set the dynamic resolution scaling to target 100.
This is just the last time I encountered this, but not the first time. I’ve been restarting the game every 2 to 3 hours.
Same issue slightly different. I get this immediate degradation when I break boxes and barrels with my frost affected sword. GPU utilization drops along with FPS and only fix is to restart the game. Rinse and repeat.
Happens with other weapons too, albeit a bit later.