After successful opening, open "Settings" → "Power Options" again, and you will be able to see the new "Ultimate Performance Mode" option, which Microsoft describes as "providing excellent performance on higher-end computers". Judging from the test results on the Internet, this so-called "Ultimate Performance Mode" is not in vain.
Select Change advanced power settings . The Power Options opens and displays a long list of settings you can change. The exact settings available will depend on your laptop, but most will at least let you change sleep settings, hibernation settings, and display brightness . How Do I Enable High-Performance Mode on My Laptop?
Switching to Performance Mode won't lift a cap that's otherwise limiting these tasks. Performance Mode will only provide a useful boost in a demanding task like video editing or gaming. Even then, the difference can be hard to notice outside of performance benchmarks.