How to Check Your PSU Without Opening Your PC Case

Have you ever needed to find out what kind of power supply your computer has, but you’d rather not fiddle with screws and wires inside your PC case? 

Your computer’s power supply unit (PSU) might not get much attention, but it’s essential for keeping your computer running smoothly.  So, what if you could figure out your PSU details and how to check your PSU without opening your PC case?

In this blog post, we’ll guide you through some easy ways to uncover your PSU’s information without needing any tools or opening your computer. 

We’ll walk you through simple steps to discover your power supply’s brand, model, and power capacity. 

By the end, you’ll be able to make informed decisions about your computer without the need to break out the toolkit. 

Let’s start our journey to demystify your PSU without any hassle – no screwdrivers required!

What is PSU?

A PSU, or “Power Supply Unit,” is like a computer’s energy source. It takes power from a wall outlet and turns it into a type that the computer parts can use. 

The PSU sends this electricity to the motherboard, CPU, graphics card, and more so they can work correctly.

Basically, the PSU gives power to all the computer parts. It needs to have enough power for your system, and it usually has different plugs to fit different parts.

Choosing the right PSU is super important when you’re building or upgrading a computer. 

It affects how well your computer works. Make sure it has enough power for all your parts, and maybe a bit extra for future upgrades.

How can I identify my PSU?

Identifying your PSU is relatively simple and can be done using a few methods, depending on your preferences and the tools available. Here’s how to identify your Power Supply Unit:

Use System Information (for Windows Users):

  • Press the “Windows” key on your keyboard.
  • In the search bar, type “System Information” and press Enter.
  • In the System Information window, navigate to “Components” in the left sidebar.
  • Look for “Power” or “Power Supply.” Here, you should find information about your PSU, including the manufacturer and wattage.

Check Your Power Supply in BIOS:

  • Restart your computer.
  • During the startup process, press the key to access your computer’s BIOS. Typically, it’s one of the function keys (F2, F12, etc.), but it can vary depending on your computer’s manufacturer.
  • In the BIOS, look for a section that displays hardware information. You should find details about your power supply there.

Use Third-Party Software:

  • Download and install third-party software designed to provide information about your computer’s hardware. Tools like “Speccy” or “CPU-Z” can help you identify your PSU and other hardware components.
  • Launch the installed software, and it will display detailed information about your power supply, including its manufacturer, wattage, and other specifications.

Check the Sticker on Your PSU:

If you’re comfortable opening your computer case (ensure your computer is unplugged from the power source before doing so), you can physically check the PSU itself. It typically has a label or sticker with essential information, including the manufacturer, model number, wattage, and voltage ratings.

This sticker is usually located on one of the sides or the bottom of the PSU.

Contact the Manufacturer:

If the above methods don’t work for any reason, or if you can’t physically access the PSU, you can contact your PC or laptop manufacturer for information about the power supply unit that came with your computer.

Remember to handle your computer’s internal components with care and ensure your computer is powered off and unplugged from the electrical outlet when opening the case. This information can be handy if you plan to upgrade your PC or troubleshoot power-related issues.


If you know how to check your PSU without opening your PC case! what PSU you have is a valuable piece of information, especially if you’re planning to upgrade your PC or troubleshoot any power-related issues.

With these methods, you can determine your PSU’s specifications without the need to open your PC case.

Whether you’re a computer enthusiast, an office worker, a student, or an IT professional, having this knowledge at your fingertips can come in handy in various scenarios.

So, take a few moments to explore your PSU, and you’ll be better prepared for your computing adventures.

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