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You are here: Home / Guides / How to Check Power Supply Wattage in Windows 11: A Quick Guide

How to Check Power Supply Wattage in Windows 11: A Quick Guide

posted on October 13, 2025

How to Check Power Supply Wattage on Windows 11

Want to check the power supply wattage on your Windows 11 PC? While Windows doesn’t directly show this info, you can still find it with a bit of detective work. Essentially, you’ll need to peek inside your PC case or delve into the manufacturer’s documentation. This guide will walk you through each step, helping you uncover the mystery behind your PC’s power supply wattage.

How to Check Power Supply Wattage on Windows 11

This section will guide you through the process of checking your power supply wattage on a Windows 11 PC. You’ll learn how to find the necessary information either physically or through online resources.

Step 1: Turn Off Your PC

First, turn off your computer and unplug it to ensure safety.

Always prioritize safety. Make sure your computer is completely powered down and disconnected to avoid any electrical hazards before proceeding.

Step 2: Open Your PC Case

Carefully remove the side panel of your computer case using a screwdriver if needed.

Once inside, locate the power supply. It’s usually a box located at the top or bottom of the case with various cables coming out.

Step 3: Find the Power Supply Label

Look for a label on the power supply unit that states its wattage.

The label will typically show a number followed by "W," indicating the wattage. It also provides other useful information like voltage and efficiency ratings.

Step 4: Use Online Resources

If the label is inaccessible, search online for your PC model or power supply unit’s specifications.

Manufacturers often list detailed specs on their websites or in the product manual, which includes power supply wattage information.

Step 5: Consult the Manufacturer’s Website

Visit the manufacturer’s website for your computer or power supply model.

Here, you can find detailed product specifications and support documents that often list the power supply wattage.

Once you’ve completed these steps, you’ll know the wattage of your power supply, helping you assess if it meets your needs or if an upgrade is necessary.

Tips for Checking Power Supply Wattage on Windows 11

  • Always ensure your computer is powered off and unplugged before opening the case.
  • If you’re unsure how to open your PC case, refer to the user manual or look online for a guide specific to your model.
  • Keep a flashlight handy to easily read labels inside your PC.
  • Write down any information you find for future reference.
  • If you’re still unsure, consider reaching out to tech support for assistance.

Frequently Asked Questions

Why can’t I find my power supply wattage in Windows 11?

Windows 11 doesn’t display power supply wattage. You need to check the hardware directly or consult documentation.

What should I do if I can’t access the power supply label?

You can find information online using the PC model or the power supply unit’s model number.

Is it safe to open my PC case?

Yes, as long as you turn off and unplug the computer first. Exercise caution to avoid any accidents.

Can I upgrade my power supply if needed?

Yes, but ensure the new power supply is compatible with your system and within your skill level to install.

How do I know if my power supply is faulty?

Signs include random shutdowns, failure to power on, or unusual noises. Professional diagnosis is recommended.

Summary

  1. Turn off your PC.
  2. Open your PC case.
  3. Find the power supply label.
  4. Use online resources.
  5. Consult the manufacturer’s website.

Conclusion

Checking the power supply wattage on Windows 11 might seem a bit like solving a mystery, but with these steps, you’re sure to crack the case. Knowing your power supply wattage is crucial, especially if you’re considering hardware upgrades or troubleshooting performance issues.

Once you’ve accessed the necessary information, you’ll be better equipped to make informed decisions about your PC. Whether you’re a casual user or a budding tech enthusiast, understanding your computer’s power dynamics can help you maintain its health and longevity.

For those eager to dive deeper, consider exploring more about how hardware components interact. This knowledge not only empowers your tech decisions but also enhances your overall computing experience. So, gear up and stay curious—there’s always more to learn in the ever-evolving world of technology!

Matthew Burleigh
Matthew Burleigh

Matthew Burleigh has been a freelance writer since the early 2000s. You can find his writing all over the Web, where his content has collectively been read millions of times.

Matthew received his Master’s degree in Computer Science, then spent over a decade as an IT consultant for small businesses before focusing on writing and website creation.

The topics he covers for MasterYourTech.com include iPhones, Microsoft Office, and Google Apps.

You can read his full bio here.

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