How To Find What Power Supply I Have?

A power supply is an essential component of any computer system that is responsible for providing electricity to all the other parts. However, one of the most common problems that computer users face is not knowing what power supply they have installed in their system. This information is crucial because if you ever need to upgrade your computer components or troubleshoot any issues, you need to know the power supply’s specifications.

Fortunately, finding out your power supply’s specifications is a simple and straightforward process. There are different methods to identify your power supply, such as looking at the label, checking your computer’s manual, or using software. In this guide, we will walk you through the different methods that you can use to know what power supply you have. With this information, you can make informed decisions when upgrading your computer components, and ensure that your system runs efficiently and reliably.

How to Find What Power Supply I Have

– Look at the label on the power supply itself: Most power supplies will have a label that indicates the wattage and voltage output. This label may also include other important information like the manufacturer, model number, and serial number.

– Check the manual: If you still have the manual for your computer or other device, it should tell you what kind of power supply you have. Look for a section that describes the components or specs of your device, and it should list the power supply information.

– Use a power supply tester: If you have a power supply tester, you can use it to determine the voltage outputs of your power supply. Simply connect the tester to the appropriate cables and check the readings.

– Check your computer’s BIOS: Some computers will list information about the power supply in the BIOS. Enter the BIOS by restarting your computer and pressing the key indicated during startup (usually F2 or Delete). Look for a section that provides system information, and it should indicate the power supply wattage.

– Use a digital multimeter: If you have a digital multimeter, you can use it to check the voltage outputs of your power supply. Simply set the multimeter to the appropriate range, connect the probes to the correct cables, and check the readings.


1. Q: How do I determine the wattage of my power supply?
A: Look for a label on your power supply that lists the maximum output wattage. You can also use a power supply calculator tool available online to estimate your power supply wattage.

2. Q: Is it important to know what power supply I have?
A: Yes, it’s important to know what power supply you have especially when upgrading or replacing components in your PC as the power supply wattage and connectors are crucial considerations.

3. Q: Can I find the power supply information from my computer’s settings?
A: No, the power supply information is not available in the computer’s settings. You need to open your computer case and locate the power supply label.

4. Q: What are the common types of power supply connectors?
A: The most common power supply connectors are ATX, EPS, PCI-E, SATA, and Molex. Each connector has a distinct shape and purpose.

5. Q: Can I use any power supply to replace a faulty one in my computer?
A: No, you cannot use any power supply to replace a faulty one in your computer. It’s important to use a power supply with the same or higher wattage rating and compatible connectors to ensure proper functioning of your computer and prevent damage.


In summary, knowing what power supply you have in your computer is an essential aspect of ensuring its stability and longevity. With the methods outlined in this article, finding out the power supply you have in your system should be an easy task. Whether you use the label on the power supply, your computer’s System Information or third-party software, you can quickly find out the power supply you have in your system and make informed decisions about upgrading or maintaining it. Remember to use caution when handling electrical equipment and always prioritize your safety when working on your computer’s power supply.

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