The power supply is a component of fundamental importance in every PC and is often unfairly ignored. Usually, you buy a power supply, when it must be replaced because it is faulty/malfunctioning or when a new PC has to be assembled.

In both cases, it is very important to correctly estimate how much energy our system needs (Watts) in order to avoid undersizing the power supply, this can cause not only damage to the power supply (which always works at the limit of the load it can supply), but also to the components connected to it, as it does not provide correct voltages.

Here we had listed out the best pc power supplies that are given below,

SaleRANK NO. 1
Thermaltake Smart 500W 80+ White Certified PSU, Continuous Power with 120mm...
  • Delivers 500 Watt Continuous output at plus 40 degree. Compliance with Intel ATX 12 Volt 2.31 and EPS 12V 2.92 standards
  • 80 PLUS Certified, 80 percentage efficiency under typical load
  • Supports (2) PCI E 6plus2pin Connectors. Active (PFC) Power Factor Correction, MTBF: 100,000 hours
  • Industry Grade Protections: (OPP) Over Power Protection, (OVP) Over Voltage Protection, (SCP) Short Circuit Protection
  • High Quality Components
Corsair RMX Series (2021), RM1000x, 1000 Watt, Gold, Fully Modular Power...
  • Fully modular, so you only connect the cables that your system needs.
  • A 135mm ML fan utilizes a magnetic levitation bearing and custom engineered rotors for high performance, low noise, and superior...
  • EPS12V connector for compatibility with modern graphics cards and motherboards.
  • 100% Industrial-grade, 105°C rated Japanese capacitors ensure unwavering power and reliability.
  • Supports Modern Standby sleep mode for extremely fast wake-from-sleep times and better low-load efficiency.
SaleRANK NO. 3
Apevia ATX-PM650W Premier 650W 80+ Gold Certified Active PFC ATX Semi-Modular...
  • 650W 80+ Gold Certified Active PFC ATX Gaming Semi-Modular Power Supply.
  • Modular Design Supports Cable Management. Connectors: 1 x 20/24pin Main Power, 2 x P8(4+4P) ESP 12V, 4 x SATA + 4 x 8(6+2)pin...
  • Auto-Thermally Controlled 135mm RGB Fan. Output: +3.3V@20A, +5V@20A, +12V@54.1A, -12V@0.3A, +5Vsb@3A
  • Heavy Duty Protections: Short-Circuit/ Over-Voltage/ Over-Power/ Under-Voltage Protections. Double Forward Converter Design.
  • Supports ATX 12V 2.3 Version. Supports Dual/Quad Core CPUs. Supports SLI/Crossfire/ Haswell. Large Japanese Capacitor.
Apevia ATX-PR800W Prestige 800W 80+ Gold Certified, RoHS Compliance, Active PFC...
  • Apevia ATX-PR800W Prestige 800W 80 Plus Gold Certified & RoHS Compliance, Active PFC ATX Gaming Power Supply. Comes with 3-year...
  • Supports Dual/Quad/multi-core CPUs. Supports single 12V output for higher power usage
  • Dc to DC converter design, provides superior dynamic response, greater system stability and maximizes the 12V DC rail output
  • Multi-gpu technologies supported; 6 pin and 8 pin PCI-E connectors support all GPU platforms. Built in 1 x auto-thermally...
  • Connectors: 1 x 20/24pin main power, 1 x 4/8pin 12V, 2 x PCI 6+2pin, 7 x SATA, 4 x peripheral. All protections
Thermaltake Toughpower GX2 80+ Gold 600W SLI/Crossfire Ready Continuous Power...
  • CERTIFIED GOLD - Supporting 80 Plus Gold efficiency up to 90% and optimized for C6 or C7 States ready
  • NON MODULAR CONNECTORS – Main Power (24 pin) x 1/ ATX 12V (4plus4 pin) x 1/ SATA (5 pin) x 6/ PCI-E (6plus2 pin) x 2/ peripheral...
  • ULTRA QUIET 120MM FAN – Dynamic Bearing fan s superior cooing performance and silent operation
  • HIGH QUALITY CAPACITORS - High quality capacitors provide superb performance and reliability
  • LOW RIPPLE NOISE – Ensure excellent power supply stability Keep performance-critical components such as VGA card to operate...
Corsair HX Series, HX1200, 1200 Watt, Fully Modular Power Supply, 80+ Platinum...
  • 80 Plus Platinum: Runs cooler and uses less power than less efficient power supplies
  • Fully Modular: Allows user to only use the cables they need for a cleaner looking build with better airflow
  • 10-year warranty: Backed by Corsair's legendary technical support and customer service
  • 135mm FDB fan with Zero RPM mode: Virtually silent operation at low loads. 8 PATA connector
  • Plus12V Rail Switch: Gives the user the choice of a single plus12V rail or multiple plus12V rails
Redragon PSU007 80+ Gold 850 Watt ATX Fully Modular Power Supply w/ 80 Plus Gold...
  • 80 Plus Gold Certification for cooler case temperature, higher energy efficiency, and less noise.
  • Built with 100% Japanese Capacitors for great reliability and durability, strikes for maximum powering stability and esports grade...
  • Equipped with a Zero RPM Mode fan, the fan only gets to work when the temperature reached 60℃, or it will keep in 0 RPM mode for...
  • 160mm Compact Size enables better and wider chassis compatibility and leaves room for a tidy cable management.
  • Up to 9 RGB Modes (26 Selected Colors), the solid fan geared with decent RGB backlit section with low consumption needed offers...
SaleRANK NO. 8
Segotep 750W Power Supply, 80 Plus Gold Full Modular PCIe 5.0 & ATX 3.0 Gaming...
  • ATX 3.0 & PCIe 5.0 Ready: The PSU can hold up to 200% total power excursion & 300% GPU power excursion, it is more stable and...
  • 80 PLUS GOLD Certified: The 750 Watt Power Supply 80 Plus Gold provides ultra-high power efficiency of 91.8% at typical load,...
  • Fully Modular Cable Design: The fully modular power supply allows use of only the cables you need for reduced system clutter and...
  • Native 12VHPWR Cable: It can generate up to 600W of power to PCIe 5.0 graphics cards, DC-DC structure, Full Bridge LLC resonance...
  • Graphics Cards Support: It comes with 2x PCIE 4.0 ports support NVIDIA RTX 20/30 Series and AMD graphics cards, 1x PCIE 5.0 port...
EVGA 850 Bq, 80+ Bronze 850W, Semi Modular, 5 Year Warranty, Includes Free Power...
  • EVGA 850 BQ - "great quality, Great value
  • 80 plus Bronze certified, with 85% efficiency or higher under typical loads
  • Fan Size/ Bearing: 140mm Teflon nano-steel Bearing - quiet and intelligent auto fan for near-silent operation
  • Heavy-duty protections, including OVP, UVP, OCP, OPP, and SCP

Buying Guide to Select the Best Pc Power Supplies 

When purchasing a PC power supply, it is essential to consider several issues that can help choose the most suitable one. This way, you will ensure that it can cover the needs of the device’s components. So, in this section, we will try to solve all your doubts.

What Exactly Are Pc Power Supplies?

The power supplies have the task of transforming the alternating current of the electrical network into direct current, that is, that used by the various components of the computer.

So, the power supplies take an alternating current of 115/230 V and transform it into low voltage direct current, which they distribute through various outputs. Therefore, if the processor is the brain of a computer, the power supply can be considered its heart.

How Does a Pc Power Supply Work?

Current power supplies work by converting all alternating current (AC) to direct current (DC) of +12 V. Then, other converters transform part of this DC from +12 V to DC from +5 V or +3.3 V to depending on your needs. This system is much more efficient and safe than direct conversion from AC to different DC voltages.

Subsequently, a series of inductors and capacitors has the task of filtering the electrical noise that can damage the different components of the device. Also, the power supply must make a voltage adjustment to respond to changes in load (consumption) to which it is subjected.

What Are the Reasons for Buying a Pc Power Supply?

The reasons for purchasing a PC power supply range from replacing the device’s power supply because it has become damaged to wanting to mount a new PC component by component. Another possible reason may be the desire to update the device with fresh ingredients and therefore need a more powerful or better quality power supply.

What Are the Advantages of Choosing the Most Suitable Pc Power Supply?

Choosing a suitable power supply has several advantages in operating the device. The most important are the following:

  1. It helps protect the useful life of other components, reducing wear and tear and protecting them from sudden increases or drops in voltage.
  2. It allows you to make the most of the performance of the various components of the device.
  3. Prevent spontaneous system reboots.
  4. It works much quieter.
  5. It allows to reduce energy consumption and, therefore, the electricity bill.

What Consequences Can the Wrong Choice of A Pc Power Supply Have?

Poor choice of a power supply can lead to undesirable effects on the performance of the device. Power outages, reboots, or unexpected and spontaneous shutdowns may therefore occur. It can also result in a drop in device performance or excessive noise when using cumbersome applications, programs, or games.

How Many Years of Warranty Do Pc Power Supplies Offer?

In general, in the European Union, the minimum warranty for electronic devices and components is two years. However, many power supply manufacturers offer much more extended warranties, ranging from three years up to ten or more.

Things to Look Before Purchase

Now is the time to choose a power supply for your PC; it is essential to take some purchase criteria into account. To simplify the selection process, we have selected the most important ones. We did it to offer you a complete guide to aim for the best possible value for money.

  1. Feeder format
  2. Power
  3. Power distribution
  4. Certification
  5. Voltage protection
  6. Cabling systems
  7. Cooling system

Feeder Format

The most common form of PC power supplies is ATX, which is usually used in most towers and middle towers. Typically, they have a height and width of 150 mm and 86 mm, respectively, with a length ranging from 140 mm to 220 mm. However, for small houses, the most common format is SFX.


The power of a PC power supply, measured in watts, is one of its main characteristics and, therefore, one of the essential purchase criteria to consider. You have to choose a power supply that covers the needs of the whole device. To get an idea, an office device can require a power of 400 W.

For a multimedia computer, however, you will need about 600 W; for a workstation, 750 W; for a gaming computer, at a minimum, 900 W, even if this value could be decidedly higher, depending on its configuration. In general, the components that consume more energy and require more power are the graphics card, the processor, and the hard disk.

Power Distribution

In addition to the total power that the power supply can provide, you must also take into account the distribution of this power for each of the rails of different voltage: +3.3 V, +5 V, and +12 V, for example. Consequently, it is essential to know the amperage of each of these rails. In particular, the one you need to focus most on is the +12 V one.

This is the rail used by graphics cards since they are the component that involves higher energy consumption. Logically, the more power the graphics card requires, the higher the amperage needed. In this regard, the formula that binds these three variables is as follows:


Perhaps even more important than the power that the power supply is capable of ensuring is the quality of the electrical flow it provides, as well as the optimization of the conversion of alternating current into direct current. To measure the energy efficiency of this conversion, 80 Plus certification is used.

Power supplies with 80 Plus certification ensure, at a minimum, to convert 80% of the electricity they consume. Furthermore, depending on whether the conversion is of worse or better quality, the certification is classified into the following categories: Standard, Bronze, Silver, Gold, Platinum, and Titanium.

Voltage Protection

Some PC power supplies have a series of filters that have the task of absorbing and reducing fluctuations in the electrical flow. In this way, they protect the various components of the device from possible current peaks. These filters are called PFC ( Power Factor Correction, from the English abbreviation) and can be active or passive.

In general, active filters are much more efficient and, therefore, more recommended. Usually, if the power supply has active filters, the manufacturer highlights it in advertising the product. If not, it means that the power supply is only equipped with passive filters.

Cabling Systems

We can distinguish mainly three ways of managing the wiring of a PC power supply:

  • Modular System: With this system, no cables come out of the back of the power supply. In their place, there are connectors to which you can connect the wires you need. Of course, the wires are included with the power supply.
  • Semi-Modular System: Presents the fixed cables considered indispensable, while connectors replace the others.
  • Fixed Cabling System: All cables are attached, therefore aesthetically, it is the least social system. However, fixed wiring power supplies are cheaper.

Cooling System

The most common power supply cooling systems are based on an internal fan. It is essential that this fan is of good quality and as quiet as possible, especially if it is to operate continuously. Some high-end power supplies also integrate a fan on and off the system.

This system turns the fan on or off, depending on the temperature. On the other hand, some power supplies use passive cooling systems based on large aluminum radiators, through which the different internal components of the power supply are cooled.

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