Power Supplies - Showing 2137 - 2160 of 18333 Products

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Refurbished: HP JL086A X372 54VDC 680W PS 680 Power Supply JL086A#ABA (Renewed)
$211 .00
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Refurbished: 656364-B21 1200W HP C3000 DL580 DPS-1200SB A Power Supply ...
$67 .00
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Refurbished: ASTEC AA23880L 200 watts Power Supply
$99 .00
Refurbished: Hp J8169-69001 Procurve 610 External Power Supply (Eps) J8169a
$617 .00
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Refurbished: HP A58x0AF 650W AC Power Supply (JC680A)
$66 .00
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Refurbished: AudioCodes Mediant 1000B Power Supply Module for M1KB-MSBG1 ...
$180 .00
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Refurbished: Delta Electronics DPS-830AB A 830watts Power Supply Unit
$249 .00
Refurbished: Juniper EX-PWR3-930-AC 930 W AC Power Supply with PoE+ Capability
$30 .00
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Refurbished: HP ProCurve 610 816W External Power Supply - 816W (J8169A)
$617 .00
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Refurbished: HPE Power Supply 5400R 700W POE+ ZL2 (J9828A)
$93 .00
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Refurbished: HPE 5400R 1100W PoE+ zl2 Power Supply 0957-2414 DCJ11002-03 [J9829A]
$386 .00
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Refurbished: HPE 5400R 1100W PoE+ zl2 Power Supply 0957-2414 (J9829A)
$386 .00
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Refurbished: Zippy Emacs M2W-6500P 500-Watt 2U Redundant Power Supply
$289 .00
Refurbished: HPE ProCurve Switch zl 1500W Power Supply J8713-69001 (J8713A)
$277 .00
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Refurbished: Factory Sealed Renew HPE X351 300W AC Power Supply US EN (JG527A)
$191 .00
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Refurbished: HP J9306A ProCurve 1500W AC Power Supply
$50 .00
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Refurbished: Emacs P1G-6300P Emacs 300 Watt 1 U Power Supply
$95 .00
Refurbished: HP 503296-B21 AC Power Supply
$43 .99
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Refurbished: HPE 650W 80+Silver PSU to I/O Switch Power Supply (JC680A-HP) JC680A
$66 .00
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Refurbished: HPE Aruba X372 54VDC 1050W 110-240VAC Power Supply (JL087A)
$129 .00
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Refurbished: Aruba PSU-1050-AC 1050 Watt AC Power Supply Module 110 V AC 220 V AC
$201 .00
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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.