It probably means that there are fewer useless background processes eating up your battery
If you’re asking about gaming performance on Linux, then the answer is that it depends on the game. Some run better on Linux (Cyberpunk made headlines recently) and some run worse.
Edit: ah, you’re asking any Armory Crate because they have the performance modes. That’s just overclocking. You can do that on Linux, but it won’t be as easy as using Armory Crate.