Valheim FPS Boost
Launch Options
You can add some lines to the launch options in Steam to enable dedicated Fullscreen and additional GPU resources. The game, by default, will run in DirectX Borderless mode.
I would recommend first trying Vulkan and DirectX borderless variants and see what gives you the most FPS. After that, try the Fullscreen variant and see if that is better or worse. I found that Vulkan Borderless performed best for me (i5 12500, 3060 Ti)
Steam
This does NOT apply to modpacks launched via Thunderstore
Launch steam and navigate to your library
Locate Valheim, right click > properties
Select the general tab on the left, then input the launch options
Xbox Store
This does NOT apply to modpacks launched via Thunderstore
???
No idea, sorryyyy!
Thunderstore Modpacks
Launch Thunderstore, select Valheim and open your modpack
Select settings on the left
Select the Debugging tab
Locate Set launch parameters
Input the launch options and click update
Boot file
You can tweak the boot.config file to enable more GPU resources and increase the CPU count to Valheim. Apparently, the boot file can be reset with updates so keep this in mind.
Options to add to your boot file;
gc-max-time-slice=???
Update the max-time-slice number to be either your CPU threads (eg if 12 threads, set to 12).
If you are streaming or using another tool while gaming that needs some CPU, like Chrome, I recommend setting it 2 or 4 below your thread count. Eg 12 thread CPU = 8 or 10.
Steam
Launch steam and navigate to your library
Locate Valheim, right click > properties
Select the "Installed Files" tab on the left
Click on Browse and file explorer will open
Open the Valheim_Data folder
Open the boot.config file in Notepad, or your text editor of preference
Add the content above
Update the
gc-max-time-slice=line per gc-max-time-slice=???
Sources:
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