How to check supported power states on Windows 11

Xiaobai Software  2022-09-28 11: 32  read 117 views

Windows 11Capable of handling various power states specified in the Advanced Configuration and Power Interface (ACPI) specification.

Most people are generally aware of commonly used power states such as on, off, sleep and hibernate.However, your computer can handle power in a number of ways.Knowing these power states can help you understand how your computer is using power, and may give you some handy ways to use your computer.


However, not all computers have all power states.You need to check the power status available in your PC according to your hardware, below we will show you how.

How toWindows 11Check your available power status in

You can use the command prompt to find out the power states available on your computer.

1. Press the "Start" menu, enter cmd, move the cursor to "Command Prompt", and select Run as administrator.

2. Type the following command and press Enter: powercfg /availablesleepstates

You'll see a list of two power states.One is a list of supported power states and the other is a list of unsupported power states.


All power states of Windows 11

You may not know what all these power states mean and how they are different.However, they are fairly straightforward to understand.Below is the list of power states you will see:

S0: working status

S0 represents the working state.This is the state when you are able to use the computer.

S0 Low Power Idle: Sleep (Modern Standby)


S1, S2, S3: Sleep power states

A "sleep" state is when one or more components of the computer are turned off or switched to a low-power mode.

The S1 sleep power state stops the CPU from working and the remaining components are either turned off or continue to operate in low power mode and the RAM remains powered.

The S2 sleep power state terminates power to the CPU, other components either shut down or continue to run in low power mode, and the RAM remains powered.

S3 is a standby state where the CPU has no power, but the RAM remains powered and refreshes at a slow rate.Other hardware components such as hard drives and fans are stopped.

Your device may also support a "hybrid sleep" mode where you can save sessions.If your computer loses power during sleep, you can continue working from where you left off.

S4: hibernate

Hibernation is different from sleep because hibernation saves the contents of memory and the operating system on the hard drive and turns off all connected devices.When you turn on your computer again, you'll be able to start working directly from where you were before hibernation.

Windows 11 also has a fastboot mode, which is a lightweight version of hibernation.It does not save everything in its current state (such as logged in users and open files and applications), but only the minimal services needed to start the system.Hence, it helps to boot the system faster.

S5: Soft off power state

S5 is a soft-off state.Only parts like the power button have trickle current.In this state, no other components are actively drawing power and the computer is not performing any computing tasks.

G3: Mechanical close

The mechanical shutdown state is also a state that completely shuts down the computer like the S5.However, the power is completely removed via a mechanical switch.No hardware components, including the power button, have any power supply.This state is usually only required when disassembling the computer.Note that the real-time clock can still run on its small battery.

Understanding Power Modes

Understanding power modes helps you understand what happens when you put your computer in a particular power state, and how power-hungry that state can be.This will give you more control over your computer.

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