https://wccftech.com/fallout-76-framerate-uncapped-physics/

The latest Fallout 76 update appears to have changed more than what has been mentioned in its patch notes as the Fallout 76 framerate now appears to be uncapped.

The release notes for yesterday’s patch don’t mention it, but apparently, Bethesda has unlocked the framerate for PC players. The framerate was capped earlier to address performance and refresh rate issues, but this enforced FPS restriction for PC now appears to be unlocked.