What the Ultimate Performance power plan does is boost the performance of high-power systems. It is designed to reduce or eliminate micro-latencies related to fine-grained power management techniques. If you notice a slight delay between the time your OS recognizes that a piece of hardware needs more power and the time it is actually delivered, you are experiencing a micro-latency. No matter how short the delay is, it can still make a difference.
The Ultimate Performance plan is designed to get rid of hardware polling, allowing the equipment or peripheral to consume all the power it needs. Moreover, it disables any power-saving features to enhance performance. That said, if a device operates on battery power, it does not have this option by default. After all, the feature consumes more power, killing the battery much faster.
Now how to enable the Ultimate Performance Power Plan in Windows 10, it's fairly simple, all you need to do is make a batch file with the following code inside and run it either in Command Prompt or PowerShell.
rem Enables the Ultimate Performance Power Plan in Windows 10.
powercfg -duplicatescheme e9a42b02-d5df-448d-aa00-03f14749eb61
if NOT ["%errorlevel%"]==["0"] (
pause
exit /b %errorlevel%
)