Does it have disadvantages for the pc if you make the ultimate performance energy saving plan on?

My question is pretty much in the title.

My question is what happens in the mode, it has disadvantages.

because I turned it on and then went from 400fps to 800fps in Minecraft. I ask for clarification.

Nope

It saves energy by pushing down the parts.

In principle exactly what you would expect from an energy saving mode

The battery life decreases.

Nope has no disadvantages for the PC. He may need a little more electricity.