Power Supplies - Showing 1393 - 1416 of 12063 Products

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Emerson Intel SR1550 SR2612 760W Power Supply DS760SL-3
$86 .99
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HP 499243-B21 2400W Modular 2400W AC Power Supply
$124 .25
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Segotep GM850 Power Supply 850W, PCIe 5.0 & ATX 3.0 Full Modular 80 Plus Gold Certified ...
$180 .99
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Genuine Bestec ATX0300D5WC ATX-300-12Z 300W Power Supply for HP P/N 585008-001
$73 .45
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255W Power Supply Replacement for Dell Optiplex 580 760 780 960 980 DT F255E-01 ...
$90 .99
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$90 .99
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CableMod RT-Series Pro ModFlex Sleeved 8-pin PCI-e Cable for ASUS and Seasonic (Black + ...
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IBM AcBel API3FS25 585W Hot Swap Power Supply 24R2640 24R2639
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Ibm 14J0665 Ibm 14J0665
$179 .69
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308619-001 HP Compaq Power Supply 150 Watt For Evo D530Ust Ultra Slim
$79 .54
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CableMod C-Series Pro ModFlex Sleeved 8-pin PCI-e Cable for Corsair RM Yellow ...
$180 .99
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HP 405060-001 Genuine Power Supply - 250 Watt 24 Pin Atx, Non-Pfc For
$47 .00
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EVGA W1 100-W1-0600-K1 600 W ATX12V 80 PLUS Certified Non Modular Active PFC EVGA 600 ...
$141 .73
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EVGA 650 BQ, 80+ BRONZE 650W, Semi Modular, 5 Year Warranty, Includes FREE Power On Self ...
$454 .65
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ASUS ROG Thor 850W Platinum II (850Watt, Fully Modular Power Supply, 80+ Platinum, ...
$430 .56
COUGAR POLAR X2 1050W, ATX3.0 Power Supply, PCIE Gen 5.0, 12VHPWR, 80 Plus Platinum ...
$443 .02
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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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Antec Signature Series SP1000, 80 PLUS Platinum Certified, 1000W Full Modular with OC Link ...
$229 .89
ASUS ROG Strix 750 Fully Modular 80 Plus Gold 750W ATX Power Supply with 0dB Axial Tech Fan ...
$179 .33
ASUS ROG Strix 750W Gold Aura Edition (Fully Modular Power Supply, 80+ Gold Certified, ATX ...
$242 .23
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EVGA SuperNOVA 1300 P+ 220-PP-1300-X1 1300 W ATX12V / EPS12V 80 PLUS PLATINUM ...
$1,095 .31
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EVGA 500 BA 100-BA-0500-K1 500 W ATX12V / EPS12V SLI CrossFire 80 PLUS BRONZE ...
$351 .28
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Seasonic FOCUS GX-750, 750W 80+ Gold, Full- Modular, ATX Form Factor, Low Noise, ...
$220 .23
Thermaltake PS-TTP-0600NNFAGU-1 600 W ATX12V 80 PLUS GOLD Certified Non-Modular ...
$108 .06
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Thermaltake Smart BX1 650W Bronze SLI/ CrossFire Ready Continuous Power ATX12V V2.3/ ...
$117 .53
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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.