FPS FIX
FPS Fix, Disable Steam Overlay
If you’re experiencing poor FPS on Doom Eternal:
1) Try Disabling The Steam Overlay
(Open your Steam Library, right click Doom Eternal, Properties, then disable Steam Overlay).
MSI Afterburner, Xbox DVR and Discord overlay can cause issues, too.
2) Run The Game in “Fullscreen” Mode
Borderless or windowed mode can cause input lag and fps dips
