You can't simply dismiss every power plan change as a placebo.
The real problem is it's extremely difficult to visualize all the power plan settings together, in one view, without using a 3rd-party tool. By default, Windows doesn't reveal all possible settings from the Power Options control panel. While you can modify reg keys to unhide more settings, there are more config options not visible to the user.
Dumping a plan out using powercfg is no better, the output has too much empty formatting, and you can't compare any two plans side by side.
powercfg is ideal if you're making a limited number of changes. For example:
- disabling hibernation
- changing a laptop's default behavior when you close the lid
- changing a display monitor's timeout
- changing a disk's timeout before spinning down
Instead, you need a
tool like PowerPlanExplorer to understand what each of the possible settings are, and how they're configured by the default plans (Power Saver, Balanced, High Performance, Ultimate).
Beyond the power plan settings, there are more settings defined by the UEFI-managed power modes for a CPU. Those are often highly specific to given CPU vendor & product family. Whereas the power plans are more generic, and will apply to any PC.