probably something bugged, I'm slightly faster RX 6600 XT, playing in Vulkan and I'm using additionally a mod to extend render distances (https://www.nexusmods.com/valheim/mods/1842) and I'm having around 100fps at max in-game settings with exception active points light shodows (because I have ton of various lights in based and I don't need each of them to cast individual shadows as it's stresses system quite a bit and adds visually very little)

Try switching to Vulkan and see if that helps. Add these launch parameters:

-window-mode exclusive -screen-fullscreen -force-vulkan

Originally posted by walentaz:

probably something bugged, I'm slightly faster RX 6600 XT, playing in Vulkan and I'm using additionally a mod to extend render distances (https://www.nexusmods.com/valheim/mods/1842) and I'm having around 100fps at max in-game settings with exception active points light shodows (because I have ton of various lights in based and I don't need each of them to cast individual shadows as it's stresses system quite a bit and adds visually very little).

i hope some updates will fix this frustrating situation

Heard of these things, reading bugs& technical section ATM but what I remember;
update drivers
Force vulkan
Disable HDR and reboot

On my side it's: AMD Ryzen 5 3600x, AMD Radeon RX 5700 XT, 16GB of RAM and Gigabyte X570 GAMING X (to be thorough) and I get like 18 fps, sometimes goes up to 60 fps in less ''demanding'' area, but as soon as I start fighting with alot of VFX, goes back down to 11-20fps. I even had full on crashes that made me lose some rare stuff since the game couldn't save my character before the crash. My drivers are up to date, I use Vulkan and switching between 1080P , 1440P, 4K and lowering or raising graphical settings barely affect the performance.