What PSU Do I Have? [3 Easy Ways to Know]

A lot of PC users want to know the model and make of their CPU, PSU GPU, or motherboard.

The power supply of a computer is usually the most underrated component.

While the performance of a system depends on many factors, there is no denying that a quality power supply not only ensures a stable operation and long life for your PC but can also improve your overall system performance.

Knowing the PSU, you are using is easy, although you need to do it physically since there is not any software that can detect it.

There can be three situations why you would know your computer PSU.

  • You have a pre-built PC that comes from a single manufacturer
  • You have an assembled PC made from assembling hardware from different manufacturers
  • You have purchased a second-hand PC and don’t know PSU it is using.

Well, finding the PSU is easy in all of the above situations.

What PSU Do I Have Without Opening Case?

First Method

One of the most basic methods to check the power supply is by manually opening the chassis side panel and physically inspecting the label on the PSU.

A label with PSU model and serial number is located either at the back of the unit or somewhere on its side panel.

Note that some manufacturers put labels at both places to make sure that you will find them easily.

The label is like a sticker with some details about the serial number and wattage printed on the PSU directly or embossed on the covering.

This information includes the manufacturing date, model number, and its release version.

The Second Method

This method is relatively easy, in case you have brought an assembled PC made by a single manufacturer.

All you need to do is search for the device on the internet or the official manufacturer’s website to know the details of your PSU.

Many brands such as HP and Dell provide information about their tower device, including the PSU inside.

For example, the image below shows the PSU that comes with HP Envy Desktop computer.

PSU specification of an HP envy desktop computer

Third Method

Another way to find the specification of PSU you have is by checking details on its box.

Many manufacturers print details on the box that comes with PSU, including its model and wattage.


Understanding your PSU

Understanding a PSU specification is not necessarily difficult. You will find various PSU models that look similar in terms of size and wattage but differ in the number of connectors, performance curves, and efficiency.


The main thing to notice in the configuration is the wattage of the PSU.

The wattage determines the power consumption, which plays an important role in keeping your system stable when operating under a specific load.

If your PC components don’t have enough wattage, the system will not load. Worse yet, by not providing adequate wattage, you might damage some of the hardware connected to your PC.


Second, you will be able to know whether your PSU is of custom or standard quality.

Power supplies that are designed for gaming PCs, such as those made by Corsair, Cooler Master, EVGA, and Thermaltake, are standard PSUs and are black in color.

The custom quality PSUs are lighter and are made up of aluminum, having a silver appearance.

They usually come with pre-built desktop computers such as those from Acer, Dell, or HP.

In contrast to branded PSUs, their fans are located at the rear rather than on top or bottom because they utilize less expensive materials and don’t require as much cooling as a branded one.


Finally, we have modularity, which refers to your PSU’s physical design.

It has no impact on physical dimensions, but it does affect the cables that connect to and from your power supply.

PSUs can be divided into three categories in terms of modularity: fully modular, semi-modular, and non-modular.


Through the above methods above, you will be able to know what type of PSU you are using.

Also, it is important to know the specifications of your hardware when upgrading or installing a new power supply.

This way, you will be able to understand what amount of power they would need and the wattage required for optimal performance.

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