Druid replied to Massive overall performance decrease after updating to Hearth and Home patch (and recent small patches). September 30, 2021 @ 2:10:56 am PDT
Here are a few more ideas.
1. Try clearing and/or disabling Steam and Nvidia's shader cache. I'd try one at a time and see if it fixes it. Uninstalling Valheim and Nvidia drivers probably cleared them already but it's worth a shot.
C:\Program Files (x86)\Steam\steamapps\shadercache\892970
C:\Users\%username%\AppData\Local\NVIDIA
2. Try forcing exclusive fullscreen with -window-mode exclusive -screen-fullscreen launch parameters.
3. Disable any overlays (steam, discord, RTSS, etc.).
1. Try clearing and/or disabling Steam and Nvidia's shader cache. I'd try one at a time and see if it fixes it. Uninstalling Valheim and Nvidia drivers probably cleared them already but it's worth a shot.
C:\Program Files (x86)\Steam\steamapps\shadercache\892970
C:\Users\%username%\AppData\Local\NVIDIA
2. Try forcing exclusive fullscreen with -window-mode exclusive -screen-fullscreen launch parameters.
3. Disable any overlays (steam, discord, RTSS, etc.).
11:13 am, September 30, 2021