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Refurbished: KHACHIMO HWS100A 12V 8.5A 100W For HWS100A-12 MEA ...
$698 .00
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Refurbished: 1PCS for P720 server power supply 12V130A 1725W 00E7187 7001490-J000
$81 .00
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Refurbished: KHACHIMO Small 1U CPU8Pin*2 500W Power Supply DPS-500AB-5 B ...
$299 .00
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Refurbished: 100W Power Supply FSP100-30GAF HPS100-CMCDF
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Refurbished: For Z800 1250W Power Supply, 508149-001 480794-002/003 DPS-1050DB A
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Refurbished: 1PCS for EFRP-300 Power Supply Module 300W Power Supply EFRP-300
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Refurbished: 1PCS for P2H-5500V P2H-5400V P2F-5400V P2F-5500V Industrial Power ...
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Refurbished: 3620i DC48V 700W Switching Power Supply H700ED-S0 0C0X78
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Refurbished: 7989 P510 P51A P510Q 700W Power Supply 7000967-Y000 39J4710 97P5834 ...
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Refurbished: 1pcs for FSP460-60PFG Power Supply FSP400-60GLC
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Refurbished: KHACHIMO 520 320 330 280W Power Supply FH280P-00 H280P-00 ...
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Refurbished: For Z6 G4 workstation power supply 1000W D15-1K0P1A851383-0
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Refurbished: VNX5100 VNX5300 VNX5500 CX4 1200W Power Supply SG6004 078-000-085 ...
$699 .00
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Refurbished: X3400 X3500 X3650 Server Power DPS-853AB A 39Y7377 39Y7378
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Refurbished: 1Pcs for K39 DPS-350AB-12 A E86365-007 FLEX Industrial Control Server Small ...
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Refurbished: KHACHIMO RG-S6120 S6510 550W Switching Power Supply GW-CRPS550N2C ...
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Refurbished: 1pcs for FSP120-ABCN2 FSP120-ABAN2 FSP090-ABAN2 FSP090-ABBN2 19V ...
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Refurbished: For FAST200 Controller 19K1115 IBM Fast200
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Refurbished: 1PCS For Server power supply 071-000-751-00 01 071-000-757-00 1800W
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Refurbished: QWF1EMUA 32PORT Communication Power Supply
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Refurbished: KHACHIMO R510 G6 1U 600W Switching Power Supply EFAP-601 36001025
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Refurbished: T5810 T7810 825W Workstation power supply D825EF-02 H825EF-02 1300W
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Refurbished: For R750S T650 R550 R7525 Power Supply D1100D-S0 WPJC6 K3KJC
$249 .00
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Refurbished: 1Pcs for G1W-3960V Server Redundant Power Module 960W G1W-3760V
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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.