Power Supplies - Showing 2281 - 2304 of 17938 Products

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Refurbished: For 468929-004 508148-001 DPS-850DB A 850W Z800 Workstation Power ...
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Refurbished: Power Supply 341-0533-02 PWR-C1-1025WAC
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Refurbished: KHACHIMO AIO OptiPlex 3250 5250 7450 18Pin 155W Power Supply ...
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Refurbished: For X3200M3 DPS-430EB A power supply 46M6679 49Y8280
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Refurbished: For Power Supply For PM-B2112-48-MC
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Refurbished: KHACHIMO AT 150W Power Supply SPE-4150F
$879 .00
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Refurbished: MTAA-16W-A For CONDOR Industrial Medical Power Module 5V2A ...
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Refurbished: For A840R-G -10 server power supply 3Y YM-2102B YM-2102BBR 1000W
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Refurbished: 1Pcs for PWR-C45-1000AC 1040W Power Supply 341-0037-01/02/03/04
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Refurbished: 1pcs for JPSU-850W-AC-AFO 850W 740-053352 QFX5100
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Refurbished: H750EPS-00 7000 5000 T3660 Power supply 750W M92DC
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Refurbished: For PS4000 PS6000 Power Supply RS-PSU-450-AC1N 64362-04D
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Refurbished: 1pcs for FSP300-60GLC industrial computer power supply FSP300-60PFG ...
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Refurbished: C7000 2450W Power Supply 70015 7001503-J000 488603-001 500242
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Refurbished: For Switching Power Supply HF500W-S-48 (48V10A)
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Refurbished: KHACHIMO ThinkStation S20 30 IdeaCentre 430 320 330 330 24P 625W Power ...
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Refurbished: New Switching Power Supply S8FS-C03512J-400 For 35W 12V AC100240V ...
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Refurbished: KHACHIMO X3400 3500 3650 835W Switching Power Supply DPS-835AB A ...
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Refurbished: For PS-2751-7H 750W RH1288 RH2288 V2 Server Power Supply 02131058
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Refurbished: 1PCS for PWS-981-1S redundant power module, server power supply 980W
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Refurbished: 1Pcs for DPS-250AB-44D 89B 250Wflex NAS server 1U power supply
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Refurbished: 1PCS for AD801M53.5-1M17A GERM4815TTE Output 53.5V
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Refurbished: 1PCS for FSP300-60GLC 300W industrial computer power supply
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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.