Power Supplies - Showing 2305 - 2328 of 17941 Products

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Refurbished: 1Pcs for ML30 Gen9 DPS-350AB-20 B 816337-001 821243-00 Power Supply ...
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Refurbished: New Power Supply Board APD 12V3A Power Supply FP-36A12-BAAA
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Refurbished: For 390 790 990DT 220 230 620S 3010 Power Supply H250AD-00 L250PS-01
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Refurbished: X3550/X3650 X3300/3550 M4 Server Disassembly 550W Power Supply ...
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Refurbished: Power Module LSWM1AC300 PSR300-12A2 GPR300-12A2H
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Refurbished: 1Pcs for P2G-6510P server power supply
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Refurbished: R520 G6 New Giant M1L-5650P3 Power Module 650W
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Refurbished: For MRW-6420P-R Server Power Module 420W
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Refurbished: KHACHIMO For FSP 80plus Platinum 1U 600W Power Supply FSP600-80UEPB
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Refurbished: SNP-Z309 24V12.5A 5V2A Industrial Power Supply
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Refurbished: ML150G1 Server Power Supply 339874-001 344674-003
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Refurbished: For PWS-1K22-1R Server Power Supply PWS-1K22-1R 1200W
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Refurbished: 1pcs for S5300V3 V5 02311DEP PAC800D1205-CE 800W AC Power Supply
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Refurbished: For R1V-2275V Server Power Supply 275W
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Refurbished: For MRM-6650P-R Industrial Control Network Server Power Supply
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Refurbished: KHACHIMO Power Supply For HEC 400W 500W For Rapter 400WN RAPTER ...
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Refurbished: 1PCS for POE power supply FSP300-20GSV DPS-300AB-81 A power supply
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Refurbished: For PSL520-AD GPL550-ADH 5120
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Refurbished: For X4140 X4150 X4250 A221 658W Power Supply ECD14020004 300-2015
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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.