How To See Power Supply Specs

It can be hard for newcomers to figure out what type of power supply they have in their computers. The majority of PSUs on the market lack a specification or wattage indication. 

Knowing your power supply’s wattage allows you to add more components to your PC. Most importantly, if you’re a gamer who wants to upgrade your graphics card, you need to know whether your power supply can handle the additional load.

So, if you’re wondering what power supply I have on my computer, here it is. It’s really easy to find out. Here’s what you can do about it.

How To Check Power Supply Specs

Unlike other components such as RAM, GPU, sound card, and CPU, knowing the specs and wattage rating of your PSU with software is nearly difficult. 

The most convenient way to learn about your power supply or PSU is to open the side panel of your computer case and search for a sticker or label on it that contains crucial information about your PSU, such as the PSU Name / Model number, Power/Wattage, Voltage, and Current data. 

Every PSU has a sticker/label on it, which can be found on the sides or on the top, depending on the manufacturer. It’s fine if you know how to read a label and understand what all the technical information on it means, but if you don’t, I’ll explain everything below.

How To See Power Supply Specs
How To See Power Supply Specs

 To see power supply specs, you need to follow these steps.

1. Check The PSU Label

One of the most effective methods is to open your computer case and read the printed label on the power supply. 

Here you will find all of the important information about your power supply, such as the brand name, wattage, voltage, and ampere rating. 

The ampere and voltage ratings are written in small letters, while the brand name and wattage are displayed in strong letters.

Apart from wattage, you must examine the voltage and ampere ratings when identifying your PSU to install a new GPU on your computer. If you can’t find the label on your PSU, you’ll need to try the following approach.

PSU Label
PSU Label

2. On The Manufacturer’s Website, Check For The Specifications

If you have a branded or pre-built PC, identifying your power supply without opening the casing will be much easier. To find out the wattage rating of your PSU, simply go to the official website of your computer manufacturer and search for your model number.

3. Check Additional Cables

This method will not reveal the exact specifications or wattage rating of your power supply, but it will tell you whether it is of good quality or not.

If your power supply contains several power cables, such as an extra PCI-e 6 pin or PCI-e 6+2 connector and SATA power cables, it’s likely that it’s over 450W and can easily support a mid-range GPU. If your PSU is limited in terms of extra cables, however, you should not add any more power-hungry components to your PC.

4. What Power Supply Size Should I Get for My Computer?

There are three sizes of power supply units on the market right now:

ATX (Attention Toxic Exposure) (used in some computers)

ATX-2 is a kind of ATX (used in modern computers)

• AT THE (used in older computers)

power supply available sizes
power supply available sizes

5. Connectors for Power Supplies 

You have to check the connector. 

Connectors with four pins are

  • Small devices, such as floppy drives, are commonly connected with this cable.
  • Molex Connector with 4 Pins
  • Hard discs and optical drives such as DVD/CD-ROM are connected via this cable.
  • Molex ATX Power Connector with 20 Pins
Connectors for Power Supplies
Connectors for Power Supplies


One of the most critical components of your computer is the power supply. As a result, before upgrading your PC, you should determine what power supply is installed in your system. 

We hope that this tutorial has provided you with enough information to determine the specifications and wattage rating of your power supply unit at home. 

It’s worth noting that some low-quality, non-branded power supply manufacturers distort the labeling to sell more units. 

If that’s the case, we don’t recommend installing any GPU or other power-hungry gear on your PC. When purchasing a new power supply, choose a reputed brand such as Corsair, Thermaltake, Cooler Master, and so on.

I am a computer science graduate, and I love to play games. As an offline and online marketplace seller of computer hardware, I have the opportunity to help people make informed decisions about what they can use for their needs.