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Seasonic FOCUS GX-750, 750W 80+ Gold, Full- Modular, ATX Form Factor, Low Noise, ...
$242 .36
ASUS ROG Loki SFX-L 850W Platinum (Fully Modular Power Supply, 80+ Platinum, 120mm ...
$329 .90
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Cooler Master MWE Gold 850 V2 80+ Gold Full Modular Power Supply, 850W
$230 .24
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EVGA 500 BA 100-BA-0500-K1 500 W ATX12V / EPS12V SLI CrossFire 80 PLUS BRONZE ...
$385 .28
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EVGA 850 GQ 210-GQ-0850-V1 80+ GOLD 850W Semi Modular EVGA ECO Mode Power Supply
$317 .31
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EVGA 700 BR 100-BR-0700-K1 700 W ATX12V / EPS12V SLI CrossFire 80 PLUS BRONZE ...
$315 .49
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EVGA 700 GD 100-GD-0700-V1 700 W ATX12V / EPS12V 80 PLUS GOLD Certified Non-Modular ...
$869 .62
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Antec Signature Series SP1000, 80 PLUS Platinum Certified, 1000W Full Modular with OC Link ...
$229 .89
ASUS ROG STRIX 850G 850W Gold Power Supply, ROG Heatsinks, Axial-tech Fan Design, Dual ...
$260 .57
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ASUS ROG Thor 850W Platinum II (850Watt, Fully Modular Power Supply, 80+ Platinum, ...
$450 .36
COUGAR POLAR X2 1050W, ATX3.0 Power Supply, PCIE Gen 5.0, 12VHPWR, 80 Plus Platinum ...
$446 .51
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MSI MAG A750BN PCIE5, Non-Modular Compact Gaming 750W Power Supply, 80+ Bronze, ...
$79 .99
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darkFlash PMT1050, 1050W Fully Modular Power Supply, 80 PLUS Gold & Cybenetics Platinum ...
$129 .99
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Arista PWR-501AC-F#
$969 .60
$969 .60
Sold by: Optdex
HP JC090A DC Power Supply
$377 .00
Antec High Current Gamer Series HCG750 Gold, 750W Fully Modular, Full-Bridge LLC and DC to ...
$178 .99
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Juniper JPSU-650W-AC-AFO
$486 .00
$486 .00
Sold by: Optdex
Mini-Box picoPSU-160-XT High Power 24 Pin Mini-ITX Power Supply
$49 .99
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$49 .99
Sold by: MITXPC
AXIS Power Supply
$304 .55
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ELK TRG2440 120V, Wall Mount Power Supply, Overload Protection
$16 .82
SilverStone SX750 Platinum SST-SX750-PT 750 W SFX 80 PLUS PLATINUM Certified Full ...
$193 .20
$193 .20
Sold by: RedAnt
HP J9830-61101 2750 WATT POWER SUPPLY FOR ARUBA 5400R POE+ ZL2.
$2,472 .80
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Tips for Buying a Computer Power Supply Unit (PSU)

Introduction

A computer power supply is one of the most crucial components in a computer, as it is responsible for providing stable and regulated power for the system. If you are shopping for a computer power supply, finding the ideal one will require you to consider several important criteria. Those criteria include the size and form factor of the case, the wattage requirement of the system, efficiency, and your internal cabling preference.

Size Standards

Computer power supplies are available in a variety of different sizes and form factors. It is crucial that the power supply unit (PSU) you select matches the size requirements of your case and motherboard. If you have a Mini ITX case for example, you cannot utilize a standard ATX power supply. For more information about power supply form factors, see below.

  • ATX
    The standard power supply size that will fit most mid-size and full-size tower cases. Some micro ATX cases can utilize ATX power supplies as well.
  • Mini ITX
    Mini ITX power supplies are designed specifically for mini ITX systems but may also fit other small form factor computer cases.
  • SFX
    SFX computer power supplies are smaller than standard ATX PSUs and are meant for micro ATX and other small form factor computer cases.
  • TFX
    Another small form factor computer power supply that is thinner to fit micro ATX, Mini ITX, and other smaller systems.
Wattage

A computer power supply’s wattage rating is a measurement of how much power it can provide to the hardware. When shopping for a power supply, you need to consider how much power your computer system requires. To calculate your system’s power requirement, add up the power draw for all the components.

Start with the motherboard and processor, and then include graphics cards, system memory, storage devices, and other expansion cards. For an even better estimate, you should include USB devices, internal fans, and other accessories. Once you have your estimate, try to find a computer power supply that is capable of at least that. For a larger safety margin, you should get a PSU that is well above that minimum.

Cable Management

There are two cable management options for computer power supplies, modular and non-modular. Modular cabling allows you to connect and disconnect internal power cables from the power supply itself, so you can avoid having unused cables and connectors dangling inside the case. Computer power supplies that feature modular cabling typically cost more than those without it.

Efficiency

The efficiency of a computer power supply is a ratio of how much power it provides and how much power it draws. For instance, a power supply that provides 200 watts of power but pulls 400 watts from a power outlet has a 200/400 or 50% efficiency ratio. The more efficient your computer power supply is, the less it will cost you to operate.

One metric you can use to gauge efficiency is what level of 80 PLUS® certification a power supply has, if it any. The different levels of 80 PLUS certification include 80 PLUS, 80 PLUS Bronze, 80 PLUS Silver, 80 PLUS Gold, 80 PLUS Platinum, and 80 PLUS Platinum. The most basic certification is 80 PLUS, which indicates an efficiency rating of at least 80%. The other certifications rank from Bronze to Titanium, with the latter being the highest attainable. If computer power supply efficiency is a big concern for you, try to find one with a high level of 80 PLUS certification.