Highest FPS?

[Mudbill]

Sounds sensical to me. If the computer processes 1000 frames per second it will likely use much more power and generate more heat than if it were to process 60. Therefore I suggest not letting it run any higher than necessary. Of course, if you choose to do so anyway, it's probably not gonna be very noticeable either way, but it is something to keep in mind I suppose.

If you got a 144Hz monitor, you can uncap it and maybe see some improvements, but I'm unsure if you can set a custom cap there. Perhaps V-sync will cap it there, as it's supposed to cap it to your monitor.