How To Tell What Kind Of Power Supply I Have?

A power supply is a crucial component of any computer system, as it provides the necessary energy to all the other parts. However, identifying what kind of power supply you have can be challenging, especially if you are not an experienced computer user. It would help if you had this information for various reasons, such as upgrading or replacing your power supply, troubleshooting power issues, or simply determining whether your system has enough power to support upgrades. This guide will provide you with tips on how to tell what kind of power supply you have in your computer.

In the following paragraphs, we will outline how to identify the type of power supply you own by looking at its label, measuring its physical dimensions, and checking the system’s documentation. We will also highlight the importance of determining the voltage and current ratings of your power supply, as these will tell you how much power your system can handle. With this information, you can make informed decisions about upgrades, replacements, or troubleshooting, ensuring that your computer system runs smoothly and efficiently.

How to Tell What Kind of Power Supply I Have?

To tell what kind of power supply you have, you can follow the steps below:

1. Check the label on the power supply unit (PSU) itself – This label should contain information about the voltage, amperage, and wattage of the PSU. It can usually be found on the side or bottom of the unit.

2. Check the connector on the power cord – Most PSUs will have a standard 3-prong connector on the end of the power cord. This connector is typically either a C14 or C20 type.

3. Look up the manufacturer and model number – If you’re still unsure, you can look up the manufacturer and model number of your PSU online. This information is often printed on the label or on the unit itself.

4. Check the motherboard manual – The manual for your computer’s motherboard may also provide information about the power supply requirements for your system.

5. Use a power supply tester – If you have access to a power supply tester, you can use it to determine the type of PSU you have. This device will test the voltage and amperage of the PSU and provide you with a readout.

Overall, it’s important to know what kind of power supply you have so that you can ensure that it meets the requirements of your computer system. By following the above steps, you can easily identify the type of PSU you have and make any necessary upgrades or replacements.


1. Q: How can I determine what kind of power supply I have on my computer?
A: The easiest way to find out what kind of power supply you have is to check the label of the power supply unit (PSU) itself. It should be visible on the inside of your computer case.

2. Q: Can I check my power supply model without opening the computer case?
A: No, you need to open the computer case or use software tools like HWiNFO or AIDA64 to check your PSU’s model.

3. Q: What information do I need to look for on my power supply unit to identify its model and capacity?
A: Typically, you’ll see the manufacturer’s name and logo, model number, and power output (in watts).

4. Q: Is it possible to use a power supply unit of a different wattage than the one that my computer came with?
A: It is possible, but it is important to ensure that the power supply you are swapping out is compatible with your computer’s components.

5. Q: What are the primary types of power supply units available on the market?
A: The most common types of PSU are ATX, SFX, and TFX. ATX is the standard type, while SFX and TFX are smaller and designed for use in compact or slim cases.


Now that you know how to tell what kind of power supply you have, you’ll be able to make informed decisions when it comes to upgrading your computer components or purchasing new ones. Remember to always consult your computer manual or manufacturer’s website to ensure compatibility with your power supply. Having the correct power supply can prevent system damage and ensure optimal performance, so it’s worth taking the time to properly identify your power supply type. Happy computing!

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