How To Find What Power Supply You Have?

In today’s technology-driven world, it is essential to maintain your computer or electronic device in its optimal working condition. One of the critical components that make your system work efficiently is the power supply. The power supply unit (PSU) converts the AC power into the DC power required for your device to run smoothly. It is crucial to know the specifications of your power supply such as voltage, current, and wattage to being able to upgrade or troubleshoot your computer. But how do you find out what power supply you have in your system?

Finding out the specifications of your power supply may seem like a daunting task, but it is actually quite simple. There are various ways to determine your power supply’s wattage and voltage rating, including checking the computer’s user manual, removing the PSU and physically inspecting it, checking the specifications online by entering your computer or PSU model number, or through software programs that can detect the system’s hardware components. Understanding the wattage and voltage rating of your power supply is essential to know if you need to replace or upgrade it to meet the power requirements of your device.

How to Find What Power Supply You Have?

To find what power supply you have, you can follow the steps below:

1. Check your computer manual: The computer manual may provide the information on the power supply specification used in your computer.

2. Check the label on the power supply unit (PSU): You can find the label on the back or bottom of the PSU. It will have the specification details, including the brand name, model number, and wattage.

3. Open your computer case: You can open the computer case and look at the PSU itself. The information should be printed on the side of the PSU.

4. Use a power supply calculator: You can use a power supply calculator to estimate what size PSU you have installed in your computer.

5. Use software: There are various software programs available that can detect the PSU wattage in your computer. Some popular ones include CPU-Z and HWMonitor.

6. Check the BIOS: You can also check the PSU wattage in the BIOS settings of your computer.

In conclusion, finding the power supply specification in your computer can be done by checking the manual, looking at the label on the PSU, opening the computer case, using a power supply calculator, using software, or checking the BIOS.


1. Q: How do I find out what power supply I have in my computer?
A: You can find out what power supply you have in your computer by opening the computer case and looking for a label on the power supply unit.

2. Q: What information should I be looking for on the power supply label?
A: The power supply label should display information such as the output wattage, voltage, and amperage ratings, as well as the manufacturer and model number.

3. Q: Can I find out what power supply I have without physically opening up my computer?
A: Yes, you can usually find the power supply information listed in your computer’s manual or on the manufacturer’s website.

4. Q: Is it important to know what power supply I have?
A: Yes, it is important to know what power supply you have, as some computer components may require a certain amount of power to function properly and using an insufficient power supply can cause damage to your system.

5. Q: Can I replace my power supply with a different brand or model?
A: It is generally recommended to replace your power supply with a model that matches or exceeds the output wattage and voltage ratings of your current power supply. While you can technically replace it with a different brand or model, it may not be compatible with your system or could cause damage.


Identifying the power supply that you have is a task that can save you quite a bit of time and money when looking to either replace or upgrade your computer system. There are several methods for determining the power supply unit’s specifications, including checking the label on the power supply itself, reviewing system documentation or consulting a third-party software program. Regardless of which method you choose, obtaining detailed knowledge about your system’s power supply will put you in a much better position to keep your system running smoothly. With this information, you can get the power supply unit you need without the risk of costly and frustrating mistakes.

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