Top-rated efficient computer power supplies have high-quality components to accommodate all mainstream computer and server systems. When choosing your unit, consider the form factor, cables, amperage, efficiency, protection, and specific options to customize your build.

A Form Factor and Cabling Option for Every Build

If purchasing a unit that is nearly identical to what you already have or setting up a new system, an ATX standard power supply is a good option for many desktop PC users. For the Small Form Factor (SFF) PC enthusiast, there are SFX, CFX and other SFF power supply sizes. A semi-modular power supply has only essential cables pre-installed, ensuring less wire clutter in the computer casing. Fully modular units allow builders to install cables as required, which improves airflow.

Multiple Connections Power Your System

A 24-pin connector and extension cable is popularly used to power motherboards, but the application can vary depending on the model. Four- and eight-pin connectors provide power to the central processing unit (CPU). Some graphics processing units (GPUs) require a specific power cable configuration to operate efficiently, and most power supplies address this required flexibility by offering cables in six- and eight-pin combinations. Serial ATA (SATA) connections provide power to storage devices, fan controllers and Red Green Blue (RGB) hubs in computer cases. For less common accessories, such as water cooling pumps, look for a power supply that has Molex connectors.

Match Wattage for Unique Requirements of Your PC

The watt output of a power supply determines the number and type of components the unit can support. High-end machines with several hard drives, demanding processors, discrete graphics cards, and other case accessories may require as much as 600W to 800W power supplies. Top-rated efficient computer power supplies provide a high continuous power output to meet the demands of the load and prevent potential PC problems.  Power supplies with an 80 PLUS® certification ensure 80% efficiency when supporting from 20% through 100% of the maximum load. Titanium, platinum, gold, silver and bronze ratings show the different efficiency levels for 115-volt power units. Efficient computer power supplies allow systems to run quieter since the fans run less frequently.

Efficient Computer Power Supplies Have Built-In Fail Safes

Some power supplies have surge protection built-in to keep components safe from power-related problems. Voltage protection shuts down a unit in case the output voltage exceeds a set limit. Overcurrent and overload protection circuits protect the power supply and computer by shutting down input power in case of excessive power load or current.

Multiple Premium Options Help Improve the Build Customization

A built-in cooling fan helps transfer heat from components to ensure uninterrupted computer use. A passive or active Power Factor Correction (PFC) power supply helps reduce the cost of electricity by minimizing the reactive power produced in computers. Some standard and server power supplies have a Built-In Self-Test (BIST) button for isolating the unit and troubleshooting power failures throughout your system. Top-rated efficient computer power supplies with programmable RGB lighting allow configuration for a uniform visual effect when synchronized with other lighting in your PC.

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  • 1
Thermaltake Smart Series 500W SLI/CrossFire Ready Continuous Power ATX 12V V2.3 / EPS 12V 80 PLUS Certified Active PFC Power Supply Haswell Ready PS-SPD-0500NPCWUS-W
Thermaltake Smart Series 500W SLI/CrossFire Ready Continuous Power ATX 12V V2.3 / EPS 12V 80 PLUS Certified Active PFC Power Supply Haswell Ready PS-SPD-0500NPCWUS-W
  • Fans: 1 x 120mm Intelligent Cooling Fan
  • Main Connector: 20+4Pin
  • +12V Rails: Single
  • PCI-Express Connector: 2 x 6+2-Pin
  • Model #: PS-SPD-0500NPCWUS-W
  • Item #: N82E16817153233
  • Return Policy: Standard Return Policy
  • $39.99
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  • $34.99 
  • Save: 12%
  • $2.99 Shipping

"1. Very Quite 2. Good wiring cables 3. Nice Ventilation 4. not bulky 5.Package contains necessary kit to mount 6. Floppy connector !!! (in 2017!!!) 7. No problem running with my XEON system"

  • 2
Seasonic S12III 500 SSR-500GB3 500W 80+ Bronze Power Supply, ATX12V & EPS12V, Direct Output, Smart & Silent Fan Control, 5 yr Warranty
Seasonic S12III 500 SSR-500GB3 500W 80+ Bronze Power Supply, ATX12V & EPS12V, Direct Output, Smart & Silent Fan Control, 5 yr Warranty
  • Fans: 120mm Sleeve Bearing Fan
  • Main Connector: 20+4Pin
  • +12V Rails: Single
  • PCI-Express Connector: 2 x 6+2-Pin
  • Model #: S12III-500GB
  • Item #: N82E16817151226
  • Return Policy: Standard Return Policy
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  • $59.99 
  • $7.99 Shipping

"Nice black finish, main power cables are loomed. Not experiencing any of the noise issues others have reported. Works as advertised."

  • 3
Thermaltake PS-TTP-0600NNFAGU-1 600 W ATX12V 80 PLUS GOLD Certified Non-Modular Active PFC Power Supply 80+ Gold Non-Modular SI Only Bulk Pack - OEM
Thermaltake PS-TTP-0600NNFAGU-1 600 W Power Supply 80+ Gold Non-Modular SI Only Bulk Pack - OEM
  • Fans: 120mm fan
  • +12V Rails: Single
  • Power Good Signal: 100-500ms
  • Hold-up Time: 10ms(minimum) at 80% Load
  • Model #: PS-TTP-0600NNFAGU-1
  • Item #: N82E16817153395
  • Return Policy: Standard Return Policy
  • $79.99
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  • $61.99 
  • Save: 22%
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"My current set up is a B450 mobo + Ryzen 5 3600 + RTX2060 KO + 32gb RAM. Runs without any problems. A lot of power."

  • 4
Cooler Master MWE 450 - V2 MPE-4501-ACAAW-US 450W ATX 12V 80 PLUS Standard Certified Power Supply
Cooler Master MWE 450 - V2 MPE-4501-ACAAW-US 450W ATX 12V 80 PLUS Standard Certified Power Supply
  • Fans: 1 x 120mm HDB Fan
  • Main Connector: 24Pin
  • +12V Rails: Single
  • PCI-Express Connector: 2 x 6+2-Pin
  • Model #: MPE-4501-ACAAW-US
  • Item #: 9SIB29HJ7A5879
  • Return Policy: View Return Policy
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  • $45.00 
  • Free Shipping

"Semi - passive and very quiet. Plenty of length and connector choices on the Flat braided heavy cabling. 5 year warranty Very reliable 120MM fan. Low Ripple noise, even under full load, And over 80% efficient across all loads."

  • 5
EVGA SuperNOVA 650 G3, 220-G3-0650-Y1, 80+ GOLD, 650W Fully Modular, EVGA ECO Mode with New HDB Fan, Includes FREE Power On Self Tester, Compact 150mm Size, Power Supply
EVGA SuperNOVA 650 G3, 220-G3-0650-Y1, 80+ GOLD, 650W Fully Modular, EVGA ECO Mode with New HDB Fan, Includes FREE Power On Self Tester, Compact 150mm Size, Power Supply
  • Fans: 1 x 130mm Hydraulic Dynamic Bearing Fan
  • Main Connector: 24Pin
  • +12V Rails: Single
  • PCI-Express Connector: 3 x 6+2-Pin
  • Model #: 220-G3-0650-Y1
  • Item #: 9SIAKRFG319981
  • Return Policy: View Return Policy
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  • $119.23 
  • Free Shipping

"good condition and feels so good :)"

  • 6
EVGA 500 W1 100-W1-0500-KR 80+ 500W Power Supply
EVGA 500 W1 100-W1-0500-KR 80+ 500W Power Supply
  • Fans: 1 x 120mm Sleeve Bearing
  • Main Connector: 24Pin
  • +12V Rails: Single
  • PCI-Express Connector: 2 x 6+2-Pin
  • Model #: 100-W1-0500-KR
  • Item #: 9SIB45TJJV4169
  • Return Policy: View Return Policy
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  • $50.85 
  • Free Shipping

"-Great price -Good power output -Single rail -Perfect amount and variations of pluggins."

  • 7
EVGA SuperNOVA 850 G5, 80 Plus Gold 850W, Fully Modular, Eco Mode with FDB Fan, 10 Year Warranty, Includes Power ON Self Tester, Compact 150mm Size, Power Supply 220-G5-0850-X1
EVGA SuperNOVA 850 G5, 80+ GOLD 850W, 10 Year Warranty, Power Supply 220-G5-0850-X1
  • Fans: 1 x 135mm Fluid Dynamic Bearing Fan
  • Main Connector: 20+4Pin
  • +12V Rails: Single
  • PCI-Express Connector: 6 x 6+2-Pin
  • Model #: 220-G5-0850-X1
  • Item #: N82E16817438161
  • Return Policy: Standard Return Policy
  • $169.99
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  • $144.99 
  • Save: 14%
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">loads of power in the standard form factor >the current builds are looking for 850 Watts PSUs but with the quality of this brand: I could have got away with the 750 G2. RTX 3080 (360W) + 5800X (140W) =500W"

  • 8
Rosewill BRONZE Series, RBR1000-MS, 1000W Semi-Modular Power Supply, 80 PLUS BRONZE, Blue LED Dual-Ball-Bearing Fan, ATX 12V v2.3 / EPS 12V, SLI & CrossFire Ready, Black
Rosewill BRONZE Series, RBR1000-MS, 1000W Semi-Modular Power Supply, 80 PLUS BRONZE, Blue LED Dual-Ball-Bearing Fan, ATX 12V v2.3 / EPS 12V, SLI & CrossFire Ready, Black

Limited time offer, ends 10/3

  • Fans: 1 x 135mm Blue LED Dual-ball-bearing
  • Main Connector: 20+4Pin
  • +12V Rails: Single
  • PCI-Express Connector: 3 x 6-Pin, 3 x 6+2-Pin
  • Model #: RBR1000-MS
  • Item #: 9SIA072GJ92770
  • Return Policy: View Return Policy
  • $111.99
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  • $104.99 
  • Sale Ends in 18 Hours - Save: 6%
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"I have two of these running in my home and 0 problems in over a year. 2080TI Strix and 3800X."

  • 9
CORSAIR CX-M Series CX450M 450W 80 PLUS BRONZE Haswell Ready ATX12V & EPS12V Semi-Modular Power Supply, CP-9020101-NA
CORSAIR CX-M Series CX450M 450W 80 PLUS BRONZE Haswell Ready ATX12V & EPS12V Semi-Modular Power Supply, CP-9020101-NA

Limited time offer, ends 10/15

  • Fans: 1 x 120mm Rifle Bearing Fan
  • Main Connector: 20+4Pin
  • +12V Rails: Single
  • PCI-Express Connector: 2 x 6+2-Pin
  • Model #: CP-9020101-NA
  • Item #: 9SIAYTVJ478751
  • Return Policy: View Return Policy
  • $65.98
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  • $64.99 
  • Free Shipping

"- Easy install. - Really quiet, in my opinion. - First time purchasing a Corsair PSU. It seems to be well made."

  • 10
be quiet! DARK POWER 12 1000Watt Computer Power Supply
be quiet! DARK POWER 12 1000Watt Computer Power Supply
  • Fans: 1
  • Main Connector: 20+4Pin
  • +12V Rails: 4
  • PCI-Express Connector: 8 x 6+2-Pin
  • Model #: BN658
  • Item #: 9SIA68VDSU7657
  • Return Policy: View Return Policy
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  • $279.90 
  • $5.78 Shipping

"QuietEfficient PowerfulOC mode for switching from multi to single railNo coil whineBraided cablesMore than enough cables leaving you plenty spare"

  • 11
Computer Power Supplies 1050W, RGB Power Supply Fully Modular 80+ Gold PSU, Addressable RGB Light Power Supply for Gaming PC
Computer Power Supplies 1050W, RGB Power Supply Fully Modular 80+ Gold PSU, Addressable RGB Light Power Supply for Gaming PC

Limited time offer, ends 10/08

  • Fans: 1
  • Main Connector: 20+4Pin
  • PCI-Express Connector: 1 x 6-Pin, 1 x 6+2-Pin
  • Connectors: 1 x 24 pin (20+4) ATX
  • Model #: RGB-1050 PSU03
  • Item #: 9SIB014H0F2369
  • Return Policy: View Return Policy
  • $140.99
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  • $120.99 
  • Save: 14%
  • Free Shipping

"Not much I can say, its just a fan slitter. It works fine as intended, and looks/feels of good quality. Decent price and fast shipment is also nice."

  • 12
be quiet! DARK POWER 12 850 Watt Titanium Computer Power Supply
be quiet! DARK POWER 12 850 Watt Titanium Computer Power Supply
  • Fans: 1
  • Main Connector: 20+4Pin
  • +12V Rails: 4
  • PCI-Express Connector: 6 x 6+2-Pin
  • Model #: BN657
  • Item #: 9SIA68VDSU7346
  • Return Policy: View Return Policy
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  • $249.90 
  • $5.58 Shipping

"-Great selection of sleeved cables-Virtually silent-Seems to have good build quality"