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Refurbished: For FSP500-501UN 500W 1U Server Power Supply Industrial Control Medical ...
$199 .00
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Refurbished: For RMS-6 DMX800 Storage Power Supply 071-000-326 7000672-0000
$250 .00
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Refurbished: 3Y RG-S6500-4C 700W Power Supply RG-PA700I-F YM-2701Q
$459 .00
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Refurbished: KHACHIMO Power Supply 400W Switching Power Supply P2H-5400V
$579 .00
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Refurbished: For DL580 G8 G9 1200W Server Power Supply 746073-001 748896 748287-B21
$118 .00
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Refurbished: FSP300-20GSV 24 Pin For FSP Group FSP300-20GSV 300W VCR Power Supply
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Refurbished: Communication Power Module R48-3000A3 3000W
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Refurbished: B425 Aircross 510S FSP500-20TGBAB HK280-72PP Desktop 10 Pin Power ...
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Refurbished: 1Pcs for 5890 3888 3890 xps8940 5090 7080 7090 360W power supply
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Refurbished: R150-5 Original Disassembly Switching Power Supply 5V/30A
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Refurbished: For T410 server power supply H525E-00 0YN637 0M331J 525W T3400
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Refurbished: 300W Switching Power Supply HG2-6300P
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Refurbished: For 3286659-K HDS G400 G800 Expansion Cabinet Power Supply TDPS-847AB ...
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Refurbished: 1PCS for ST-460USE/350UAC 1U Industrial Firewall Server Power Supply
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Refurbished: For Power Module GERM4815TEM
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Refurbished: KHACHIMO Power Supply For ARBOR AT P8P9 250W Power Supply ZKS-250A
$369 .00
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Refurbished: 1PCS for FSP500-501UN 500W 1U server power supply, industrial control ...
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Refurbished: Switching Power Supply MCS600-48/10 ESR-48/10B A CU-08D D
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Refurbished: KHACHIMO Power Supply For 12V50A 600W SE-600 SE-600-12
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Refurbished: For T350 R350 G7 Server Power Module DPS-700LB C DPS-1200LBC
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Refurbished: 1Pcs for TF830-V050-1 TK630-V050-01 TFXH5181 power supply
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Refurbished: For FSP400-60PFB Industrial Control Power Supply ...
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Refurbished: KHACHIMO 1500W Power Supply PBA1500T-48-F3 PBA1500T-48 PBA1500T
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Refurbished: 24V/5A Switching Power Supply TRIO-PS/1AC/24DC/5 2866310
$139 .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.