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Refurbished: For FSP 1U 400W Power Supply Industrial Grade Server Power Supply ...
$199 .00
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Refurbished: 320 7020 8020 9020 290W Power Supply HU290EM-00 L290EM-01 D290EM-00 ...
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Refurbished: Ir358 Ir608 I3550 Ih55 Power Supply HK280-86FP FSP180-50PLV
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Refurbished: For UCSC-PSU-650W V02 341-0490-02 DPS-650AB-2 A Power Supply
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Refurbished: KHACHIMO PSU For GE TS860 800W Switching Power Supply SP810 ...
$592 .00
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Refurbished: 1PCS for GPR1800-56AH GRE 360-56A Power Module
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Refurbished: 1Pcs for FSP050-DIBAN2 FSP075-DHAN3 FSP096-DMAD1 FSP065-AAC Power ...
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Refurbished: KHACHIMO FSP 610H 610G 610L 810 Rated 300W Peak 350W Switching Power ...
$159 .00
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Refurbished: MSA2000 YM-2751B CP-1391R2 481320-001 712.8W
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Refurbished: KHACHIMO V3910 V3710 8Pin 260W Power Supply 07JGJF 7JGJF D260EBS-00 ...
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Refurbished: 1PCS for SS-350SFE 350W Industrial Power Supply M-ATX SFX
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Refurbished: For HK451-11UEP 1u Server Power Supply HK560
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Refurbished: 1Pcs for 3Y YM-2301E YM-2301EA02R 300W Server Redundant Power Supply ...
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Refurbished: 1pcs for ACE-A160A-R11 SPI350U4BB SPI400MP FSP400-60EPN(80) ...
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Refurbished: KHACHIMO 24V 100W For LEP100F LEP100F-24
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Refurbished: KHACHIMO 110V7A 800W Power Supply HF800W-S-110
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Refurbished: 1Pcs for KSA-300S2 DPS-280AB-4A/4B/6C 7816N POE surveillance video ...
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Refurbished: P100-24 Original Disassembly Switching Power Supply 24V/4.5A 100W
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Refurbished: NIXDORF ATM 2050XE 333W Power Supply P06002 PO6002 01750136159
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Refurbished: KHACHIMO 1600A oil cooled microwave equipment power supply 1500w
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Refurbished: For TDK-LAMBDA SWS1000L-7R5 7.5V 120A 480A 4
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Refurbished: 1Pcs for video recorder power supply DPS-300A B-81B/FSP350-20GSV
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Refurbished: 1PCS for 468929-004 508148-001 DPS-850DB A 850W Z800 Workstation ...
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Refurbished: PLA600F-24 Switching Power Supply PLA600F Series Output 24V 25A 600W
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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.