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The computer power supply, also known as PSU is hardware that converts the power provided from the outlet into useable power for the computer. The power supply of a computer is important because, without it, the internal hardware cannot function.

It runs through electricity routes from the alternating current (AC) provided by the power company into the direct current (DC) used by the PC components in the required voltage.


Most people do not know the power supply they have on their computers. Others are curious to know but do not know how to find it.

The PSU controls everything contained on the computer. Generally, the PSU is installed on the computer. It is mounted inside the back of the case, usually at the back left or back right.

The PSU contains a fan cooling the power supply, a connection for the power cord to the computer, a switch to turn the power supply on and off, a red switch to change the power supply voltage.

It is important to know your computer’s PSU to avoid putting excess load on your computer.  When the PSU is overloaded, it could make the whole system crash and even go as far as affecting internal components.

Knowing the PSU capability would help ensure that when there is a need for an upgrade because the user already knows the capability of the PSU, he would purchase something of higher quality and better upgrade as compared to the previous one.

PSU’s can be protected from surges and voltage drops with a UPS or a surge protector.


The PSU of a computer is checked physically because the power supply does not interact with the motherboard in any way that would communicate its model information.

Mostly, every PSU has a sticker on the outside on which the specs is indicated. If there is no sticker, the odds are that the sticker is in a part that is not visible.

This means that you have to remove the power supply to be able to identify it. If after removing the power supply and looking for the sticker on the inside and you are still unable to identify it, the purchase of a new power supply is advised.


The first rule here is to have in mind that a higher wattage does not mean it is better for the computer.

When buying a power supply, make sure the continuous wattage meets your needs to avoid crashing when the PC is running a full-load.

You should also try to buy from a seller with a lot of reviews. The seller should have a reputable brand that readily offers conditions and warranties.

You should also look out for Corsair, Seasonic, and Antec as they are reputable manufacturers.

Relatively cheap and lightweight models should also be avoided.

The PSU’s connectors must also be compatible with the computer.

Generally, there are three features you should look out for when picking a PSU: Power Output, Rails, and Efficiency because they control the entire performance of the PSU.

A single-rail and multi-rail PSU both work equally well and are both very safe, so that, you do not have to worry about which to use as either could work well.

Another requirement in picking the right PSU is to check the cabling. A PSU with hard-wired cabling is advised because it does not need additional connections between the units PCB and the connector which is plugged into one of the components.

The PSU also has to have connectors that are compatible with every component on the computer. Some PSU comes with built-in protections such as overvoltage protection, overload, and overcurrent protection; to protect it from power-related issues. It would normally inflate the price of the PSU but it is worth it.

Another consideration to be put in place before purchasing a PSU is its efficiency rating. You should make sure the PSU carries 80PLUS certification labels.

Again, make sure to pick a form factor that matches your power supply with your case and motherboard.

Due to the amount of heat generated by the power supply, you may want to put into consideration the quality of the fan installed in the PSU. It is also necessary to have the fan stay cool, run efficiently with as little sound as possible.

Larger cooling fans typically move more air while making less noise and so should be considered over the smaller fans.


1. Corsair RM750x

– Form Factor: ATX; Capacity750W; Efficiency Rating:80 Plus Gold. It is reliable with a warranty; fully modular cables; quiet fan; slightly pricier than competitors.
2. Thermaltake Toughpower PF1 ARGB 1200W:

It is the best PC for those with a high-powered mirrored setup. It has a good transient response, fully modular but it is noisy and expensive.

3. EVGA 500 B1:

This PC has a low price, 6 SATA cables, and a 500W rating. It is mostly for those who are in the market for an affordable PC.

4. XPG Core Reactor 750W:

It is efficient and silent, has full power at 47degrees Celsius, has a good and transient response but it is expensive.

5. be quiet! Straight Power 10:

Its line-up runs nice and quiet. It has quiet ETX  and EPS support.

6. Thermaltake Toughpower Grand RGB 1050W Platinum:

It is very efficient, fully modular but for its cons, it has a weird fan profile and no over-temperature protection.

See Also: How To Fix Power Surge On The USB Port In Windows 10

7. Silverstone SFX Series SST-SX550:

It has a compact size as it can fit into a number of cases, ATX and EPS support but has a limited number of connectors.

8. Corsair AX1500i:

It has a titanium efficiency rating, monster capacity but on the downside, huge price tag, and enormous size.

9. NZXT E650- Form Factor:

ATX, Capacity:850W, Efficiency Rating:80 Plus GOLD. It has digital power monitoring, NZXT CAM software integration, sleek integration, sleek design but expensive.
Amongst others.