How to Check Power Supply on PC Windows 11: A Step-by-Step Guide

To check the power supply on your PC running Windows 11, you’ll need to look at a few different tools and indicators. This process involves checking both hardware connections and software settings to ensure your PC is receiving the right amount of power and functioning correctly. It’s a straightforward procedure that doesn’t require any advanced knowledge. By following these steps, you’ll be able to diagnose and verify that your power supply is working as it should.

How to Check Power Supply on PC Windows 11

Follow these steps to ensure your power supply is in good health and your PC is running smoothly.

Step 1: Turn Off Your PC

First, turn off your PC to safely inspect any hardware connections.

Make sure to unplug the power cable from the wall outlet to avoid any electrical hazards. This step is crucial before opening the case or checking any internal components.

Step 2: Open the PC Case

Next, open your PC case to access the internal components.

This usually involves unscrewing a few screws on the back panel of the case. Once inside, look for the power supply unit (PSU), which is typically located at the top or bottom of the case.

Step 3: Inspect Physical Connections

Check all the cables coming from your PSU to ensure they are properly connected.

Look for any loose or frayed cables. Ensure that the main power connector is securely attached to the motherboard and that other peripheral connections are firmly in place.

Step 4: Use a Multimeter

If you have a multimeter, you can use it to test the voltages coming from your PSU.

Carefully insert the multimeter probes into the power connectors to measure the output voltages. Compare these readings to the voltage specifications listed on the PSU label.

Step 5: Check BIOS Settings

Restart your PC and enter the BIOS setup to check the power supply status.

You can usually access the BIOS by pressing a specific key like F2, F10, or Del during startup. In the BIOS, navigate to the hardware monitoring section to see the voltages and temperature readings related to your PSU.

Step 6: Use Software Tools

Download and run software tools like HWMonitor or CPUID to check your PSU’s performance.

These tools provide real-time information about various hardware components, including the power supply. Look for any irregularities or warning signs in the voltages and power readings.

Once you’ve completed these steps, you should have a good understanding of your power supply’s condition and whether it needs any adjustments or replacements.

Tips for Checking Power Supply on PC Windows 11

  • Safety First: Always unplug your PC before opening the case to avoid electrical hazards.
  • Documentation: Keep your PSU’s manual handy for reference, especially for voltage specifications.
  • Regular Checks: Make it a habit to check your power supply every few months.
  • Software Updates: Ensure your diagnostic software is up-to-date for accurate readings.
  • Consult Professionals: If in doubt, consult a professional technician to avoid damaging your components.

Frequently Asked Questions

What should I do if my PSU has no visible damage but my PC won’t start?

Check all cable connections and use a multimeter to verify the output voltages. If everything appears normal, the issue might be with another component.

How can I tell if my PSU is failing?

Symptoms include random shutdowns, failure to start, and unusual noises. Software tools or BIOS readings showing irregular voltages can also indicate a failing PSU.

Can I check my PSU without opening the case?

While physical inspection requires opening the case, software tools can give you insights into the PSU’s performance without opening the case.

What software is best for monitoring PSU health?

HWMonitor and CPUID are popular choices for real-time monitoring of power supply and other hardware components.

Is it safe to use a multimeter on my PSU?

Yes, but proceed with caution and follow the instructions. Improper use of a multimeter can damage your components or result in inaccurate readings.


  1. Turn off your PC.
  2. Open the PC case.
  3. Inspect physical connections.
  4. Use a multimeter.
  5. Check BIOS settings.
  6. Use software tools.


Checking the power supply on a PC running Windows 11 is an essential task to ensure your system runs smoothly and efficiently. From verifying physical connections to using software tools, these steps provide a comprehensive approach to diagnosing your PSU’s health. By regularly monitoring and maintaining your power supply, you can prevent many common issues that could disrupt your computing experience.

Remember to prioritize safety by turning off and unplugging your PC before any inspections. Utilize both hardware and software methods for a thorough check. Don’t hesitate to consult a professional if you encounter any difficulties.

For further reading, consider diving into more advanced topics like power supply efficiency ratings or the impact of PSU quality on overall system performance. Keeping your power supply in top shape is fundamental to maintaining a robust and reliable PC setup.

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