How to Find Out What Power Supply You Have Without Opening a Computer

If you have problems identifying the model and characteristics of your power supply, then you have come to the right spot. Checking your power supply and evaluations is essential for numerous purposes like adding and overclocking new components. 

Do you stuck at How to Find Out What Power Supply You Have Without Opening a Computer? A power supply gives electric power to components. The word often applies to devices that integrate within the powered element. Computer power supplies, for example, transform AC into DC and are usually placed at the back of the computer case with at least one fan.

Power Supply of the Computer

A power supply unit (PSU) transforms the AC mains to low voltage, controlled DC power for internal computer components. Modern personal computers universally use power supplies in switched-mode. Some power supplies feature a manual selection switch for input voltage, while others adjust automatically to the power supply.

Most modern desktop computer personal power supplies comply with the ATX specification, including form factor and voltage tolerances.

During the connection of an ATX power supply to the power supply, it continually supplies a 5-volt (5VSB) output, allowing computer standby operations and specific peripherals to be powered. A motherboard signal switches on and off the ATX power supplies.

They also give the motherboard a signal to signify the necessary DC voltages so that the computer may safely boot and power up. The latest ATX PSU standard release in version 2.31 in mid-2008.

What Is the Function of Computer Power Supply?

How to Find Out What Power Supply You Have Without Opening a Computer

The desktop computer power generator converts the AC from a wall socket of the power supply into a low voltage direct current (LV) for the operation of the motherboard, CPU, and peripheral devices. Several direct-current voltages are necessary and must be controlled with some precision to ensure reliable computer functioning. A rail or a voltage supply rail refers to a single PSU voltage. 

Some PSUs also supply standby voltage so that much of the computer system can be switched off after wintering or shutdown and reactivated by an event. Standby power allows a remote computer to start via wake-on-LAN, a Wake-on-ring, or, if supported by the motherboard, a local keyboard Power ON (KBPO).

This standby voltage can be provided by a small linear power supply within the unit or by a switching power supply shared with the central unit to conserve money and energy.

Why Know About Your Power Supply?

If you want to improve your graphics card, you should know about your PC power requirements or add a graphics card or any other component. It is because the new element adds extra load to your Power supply. If your power supply power needs exceed your Power supply Wattage, it may stress and cause your Power supply to fail or burn it down and may damage your interior components as well.

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Also, you must acknowledge the specification of your present Power supply if you wish to update your Power supply to make the appropriate choice when picking a better and more robust collection.

How to Find Out What Power Supply You Have Without Opening a Computer?

Here are the ways to learn which power supply unit you have:

Find the Power Supply Information on Your Box

If you have the pass box, you can check its model and its specification. Some power supplies provide an international manual. To find out how to install the power supply on your computer, you can read the documentation. I think it’s the easiest way to find the power supply, model number, and other essential parameters to check the power supply box.

Find the Power Supply Information on the Official Website of That Manufacturer

However, the second way is easier, especially in the event of a computer built by only one maker. You can move to the official website of that maker and search for your system model, from where you can find out related the specs of your Power supply.

FAQs-How to Find Out What Power Supply You Have Without Opening a Computer?

What Is a Good Watt for Power Supply?

Many modern gaming systems with a 6 to 8-core CPU and a midrange to high-end graphics card are supposed to be powered up to 650W up to 850W, with 750W a long-term sweet spot for players. More robust gear requires greater wattages, particularly if you plan to overclock.

Why Does a Power Supply Need a Fan?

Power supplies generate heat that may damage the circuit components. As a result, the power supply must incorporate a cooling mechanism to dissipate excess heat. Since they require extra electricity, fans reduce the efficiency of the power supply.

Do I Need a Power Supply for My Computer?

The power supply is one of the least fascinating yet most vital components of the PC. It’s tempting to get a power supply for running your PC, but this isn’t a sensible choice. A power source with no stable or clean electricity can produce a range of difficulties, including instability, which can be difficult to pin.

How to Tell if Your Power Supply Is Bad?

If your Power supply continually shuts down your PC while running, then 50 percent can be sure that it’s awful. A different Power supply can be used on your PC to verify the performance to validate whether or not your Power supply is inadequate. Most non-branded power supplies are insufficient and could damage your PC components quickly.


A power supply is one of the essential components of your PC. Most computer hardware problems are due to a faulty power supply or a power supply with insufficient power delivery.

Hopefully, you have learned How to Find Out What Power Supply You Have Without Opening a Computer? and it also helps you make basic designs for your computer.

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