Powersaver

By default, Unity uses your GPU to the fullest. Wasting unbounded amounts of power, heat, and making your PC altogether slower if your rig already isn't that powerful or if you're doing unity work while in VR to give you 100+ FPS on an editor window... especially in play mode. Out of play mode, it works a bit differently, but the waste still applies.

Powersaver enforces a fixed frame-rate of 60.
You can also select 30, or VSYNC.

Tools > VividNightmare > Powersaver

License

These are configurable options already available in unity. Addon is provided for ease of use, and for non-technical users that may not know the existence of this option. Use whereever.