How To Check What Power Supply I Have In My Pc?

The power supply unit (PSU) is an essential component that provides the necessary power to the computer’s internal components. It is responsible for converting mains AC voltage to DC voltage, which powers the computer’s motherboard, CPU, graphics card, and other hardware. The PSU can also affect the stability and performance of your computer. Therefore, it is crucial to know the type and capacity of your PSU to ensure that it meets the requirements of your system. In this article, we will discuss how to check what power supply you have in your PC.

There are several ways to determine the type and capacity of the PSU in your system. You can check the label on the PSU itself, use software tools, or check the BIOS settings. Knowing your PSU’s specifications will help you to upgrade or replace it with a more powerful or efficient unit to improve system performance or accommodate additional hardware components. Let’s explore these methods in more detail.

How to Check What Power Supply I Have in My PC?

When it comes to checking the power supply in your PC, there are a few ways to do it. Here are some steps to follow:

1. Check the Label: The easiest way to determine what power supply you have installed in your PC is to look at the label on the actual power supply unit (PSU). The label should provide all the necessary information about the power supply, including the model number, capacity, voltage, and wattage rating.

2. Use System Information: Another way to check the power supply in your PC is to use the built-in System Information tool in Windows. You can access this tool by searching for “System Information” in the Start menu or by pressing the Windows key + R and typing “msinfo32” in the Run box. Once in the System Information tool, go to the Components > Power tab to see the details of your PSU.

3. Use a Power Supply Calculator: If you don’t have direct access to your PC’s power supply label or System Information tool, you can use an online power supply calculator to determine the wattage requirements of your system. This can help you determine if your current PSU is adequate or if you need to upgrade to a higher-capacity unit.

4. Open your Computer Case: If you really need to know what power supply is installed in your PC, you can always open up the computer case and physically inspect the power supply. Be sure to unplug your computer and take precautions against static discharge before opening the case. Once inside, locate the power supply unit and look for the label with the necessary information about the PSU.

In conclusion, checking the power supply in your PC is a relatively easy process. You can either look at the label on the power supply itself, use the built-in System Information tool in Windows, utilise an online power supply calculator, or you can open up your computer case and inspect the power supply physically.


1. How can I check what power supply is installed on my PC? You can check the label on your power supply unit (PSU) to see the brand, model number, and wattage rating. Alternatively, you can use software tools like CPU-Z or HWMonitor to view your PC’s hardware specs, including your PSU’s details.

2. Is it important to know what power supply I have in my PC? Yes, it is important to know your PSU’s wattage rating, efficiency rating, and other specifications to ensure that it can handle the power requirements of your components and prevent system instability or damage.

3. Can I upgrade my power supply without replacing other components? Yes, you can upgrade your PSU without replacing other components as long as the new PSU has the same or higher wattage rating, the right connectors, and adequate cooling capacity. However, you may need to adjust your cables and cable routing to fit the new PSU properly.

4. What are the common wattage ratings for power supplies? The most common wattage ratings for PSUs are 400W, 500W, 600W, 700W, 800W, and 1000W. The right wattage for your PC depends on your hardware specifications, usage scenario, and overclocking plans.

5. How can I troubleshoot power supply issues on my PC? If you suspect that your power supply is causing issues like system crashes, restarts, or shutdowns, you can use tools like HWMonitor or PSU calculator to check your PSU’s voltage readings, power draw, and efficiency. You can also try to replace the PSU or test it outside of your PC using a PSU tester or multimeter. If the issue persists, you may need to seek professional help or contact the PSU manufacturer.


In conclusion, knowing the power supply of your computer is essential for a variety of reasons, including upgrading your hardware and preventing damage to your components. By following the steps outlined in this article, you can easily check what power supply you have in your PC. So, make sure to check the wattage, efficiency rating, and connectors of your power supply and keep your computer running smoothly.

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