Part of Linux
If you playing on Linux you might have the issue where you don't want to use VSync - mainly when running a weird special setup with multiple monitors, with rotations and different refresh rates - but at the same time you don't want your PC to be running that card game at 900 FPS and using Energy / putting Heat out like there is no tomorrow.
If the game is running on VULKAN - or via the Proton compatibilty layer - you can limit the FPS by:
DXVK_FRAME_RATE=90 %command%
This will set the game to run at max. 90 FPS