Power Supplies - Showing 2329 - 2352 of 17990 Products

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Refurbished: 1Pcs for PDC150WA Communication Power Module
$118 .00
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$118 .00
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Refurbished: DZY-48/30HIII 48V 30A Communication Power Rectifier Module
$238 .80
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Refurbished: C521 Power Supply NH429 MH596 D233N
$79 .00
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Refurbished: 1pcs for P720/P740 VRM Regulator Module 74Y9189
$192 .00
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Refurbished: 3850-24XU 350W Power Supply PWR-C1-350WAC-P DPS-350AB-34 A ...
$499 .00
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Refurbished: Power Supply DPSN-66BP A HRS66-6000AD VC66B200AS GPL66-12ADH ...
$199 .00
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Refurbished: 1PCS for S7500 series switching power supply LSQM1AC1400 PSR1400-A
$250 .00
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Refurbished: For 9000TGI power supply PC7033 EI5G450W FSP350-60AGBAK
$132 .00
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Refurbished: TDK-LAMBDA HWS600 24V 600W Switching Power Supply HWS600-24
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Refurbished: For DL580G7 490594 498152 570451 579229-001 Server power supply 1200W
$162 .00
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Refurbished: KHACHIMO ALPHASERVER ES40 ES45 720W Power Supply API-7650 ...
$1,299 .00
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$1,299 .00
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Refurbished: 1PCS for P720 server power supply 12V130A 1725W 00E7187 7001490-J000
$81 .00
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Refurbished: 1Pcs for R48-3500E Communication Power Module 53.5v50A
$388 .00
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Refurbished: For M1L2-5650P3V 650W 1+1 Rredundant 2U Power Module
$339 .00
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Refurbished: 1Pcs for DPS-500AB-22 T 500W 1U Power Supply ITX
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Refurbished: KHACHIMO 80plus 1U 460W Power Supply FSP460-701UG FSP460-601U ...
$249 .00
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Refurbished: LSUM1AC2500 Power Module CAR2512FPB-Z
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$1,299 .00
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Refurbished: 1PCS for 12V97A 1200W PS-2112-5L Server Power Supply
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Refurbished: 1Pcs for SPAFFIV-04G PWR-0199-04/03 For F5 Big-IP 10000 Power Supply
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Refurbished: KHACHIMO R7525 2800W Power Supply D2800E-S1 1PDR6 01PDR6
$999 .00
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Refurbished: For 802 power supply 00JA873 expansion cabinet power supply
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Refurbished: OptiPlex 580 760 780 960 980 Black 24Pin 235W Power Supply FR610 PW116 ...
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Refurbished: For A1WF2DC490 430W ISTOR Power Supply
$220 .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.