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Refurbished: 1Pcs for HDS HUS110 HUS130 3285122-A 3285118-A Power Supply
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Refurbished: For MRW-6420P-R Server Power Module 420W
$249 .00
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Refurbished: For 5100 23-0000092-02 TDPS-150BB A 7001485-J000 switching power ...
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Refurbished: PDM 48/41-2000 R48-2000eR Communication Power Supply 13A 2000W
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Refurbished: 1Pcs for G115D 6SL3521-3XA27-5AA0 Inverter
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Refurbished: DL320G2 Server Power 293367-001 288638-001, ps-5181-5c
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Refurbished: For R720 06W2PW 0D5MW8 05NF18 09PXCV 750W Server Power Supply
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Refurbished: For SUN Workstation Power APS-112 300-1357 SUN B2000 power, 3001357-05
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Refurbished: 1Pcs for TDPS-1500AB-7 A 12V 125A 1500W Switching Power Supply
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Refurbished: Power HK600-12FP
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Refurbished: PWS-1K43F-1R 1400W SC748 Server Power Supply
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Refurbished: For YM-2281A 6494534-13 YM-2281A Power Supply
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Refurbished: 1PCS power supply for video recorder DPS-80PB-10A 7916/7932HE-E4 ...
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Refurbished: DPS-715CB A N3000 N3046P N3048P Power Supply 03WH5T 715W
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Refurbished: KHACHIMO PSU For FSP 550W Switching Power Supply FSP550-80GHN
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Refurbished: KHACHIMO 3667 3268 3650 6Pin 240W Power Supply H240NM-00 B240ES-00 ...
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Refurbished: For MRW-3450V-R 450W Server Power Supply 1+1 Redundant Module
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Refurbished: New Power Supply POWER GENERAL 9V4.4A Power Supply FLU1-40-2
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Refurbished: For 5100 23-0000092-02 TDPS-150BB A switching power supply
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Refurbished: KHACHIMO GX100 GX110 GX200 MT NPS-200PB-73 M PS-5201-7D 9228C ...
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Refurbished: 1pcs for T3600/3610 T5600 Power Supply F635EF-00 1K45H ...
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Refurbished: For T5120 X4140 X4150 Server Power 300- 2015-05 A221
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Refurbished: KHACHIMO Power Supply Chenglian 12V 24V 60W Power Supply CL-A7-60-12 ...
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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.