How To Tell What Your Power Supply Is?

In the world of computer hardware, the power supply unit (PSU) is a critical component for ensuring that your device functions smoothly. However, there may be times when you need to know the exact specifications of your power supply unit, especially when upgrading or replacing it. This is where the question arises: how to tell what your power supply is? Fortunately, there are multiple ways to identify the specifications of your PSU.

The first and easiest way to determine your power supply specifications is by checking the label or sticker on the power supply itself. This label provides all the relevant information of your PSU, including model number, wattage, and amperage ratings. However, the label may not be accessible in some instances, such as when the PSU is installed in an enclosed space, or when it is a pre-built computer. In such cases, you can use software tools or hardware devices to ascertain your PSU’s specifications. In the following sections, we will dive into these methods in more detail.

How to Tell What Your Power Supply Is?

When it comes to identifying your power supply, there are several methods you can use. Here are a few ways to help you do so:

– Check the label: Typically, power supplies will have a label on the exterior that outlines important information, such as the manufacturer, model number, voltage, amperage, and wattage. This label can help you identify your power supply quickly.

– Use a multimeter: If you don’t have access to the power supply’s label or manual, you can use a multimeter to measure the voltage and amperage. To do this, first, unplug the power supply from any mains connection, and then use the multimeter probes to test the output of the power supply.

– Check the connector: Another way to tell what your power supply is to look at the connector that connects the power supply to the device. Many power supplies have unique connectors that match specific brands and models. By identifying the connector type, you could narrow down your search for the power supply.

– Look up the model number: If you can’t find any information on the power supply itself, try searching the model number online. This may provide you with valuable information about the power supply’s wattage, voltage, and amperage.

– Consult with a professional: If you’re still unsure about what your power supply is, it may be best to consult with an expert or a professional technician. They can help you identify the power supply and ensure that you’re using the correct power supply for your device.

In conclusion, identifying your power supply requires careful attention to detail and a few simple tools. By using these methods, you can easily identify your power supply and ensure optimal device performance.


1. How can I determine the wattage of my power supply?
Answer: You can check the label on your power supply unit (PSU) or use a power supply calculator online to determine the wattage.

2. Can I determine the power supply’s voltage without opening the computer casing?
Answer: Yes, you can check the label on the power supply unit for the voltage rating.

3. Is it necessary to know my power supply’s model number?
Answer: Not necessarily, but it can be useful to have if you need to replace your PSU or troubleshoot any issues related to it.

4. What connectors should I look for in my power supply to determine compatibility with my computer?
Answer: You should look for connectors such as the 24-pin motherboard connector, 4/8-pin CPU connector, SATA power connectors, and PCIe power connectors.

5. What are some common signs of a failing power supply?
Answer: Some common signs of a failing power supply may include frequent shutdowns, erratic behavior of computer components, strange noises coming from the computer, and the computer not turning on at all.


In order to determine the type and capacity of your power supply, you can use a variety of methods. Whether you check the label or manual, use software or hardware tools, or simply look at the specifications, knowing the power supply details is essential for troubleshooting, upgrading, or building a computer. By following the tips and guidelines in this article, you can easily tell what your power supply is and ensure reliable and efficient power delivery for your system.

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