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Refurbished: KHACHIMO 700W Switching Power Supply DPS-700MB A 51891695
$329 .00
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Refurbished: For FSP300-50SNV ITX Desktop SFX Small Chassis Power Supply 300W 110V
$179 .00
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Refurbished: For 24V10A Industrial Control Programming ECO Regulated Switching Power ...
$249 .00
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Refurbished: 250PSU Flex POS Machine Cash Register Power 200W
$139 .00
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Refurbished: DPSN-210CB A Switch 210W Communication Industrial Computer Power ...
$339 .00
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Refurbished: 1PCS for NF8460 NF8480M3 M4 M5 GW-CRPS800B Redundant Power Module ...
$323 .00
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Refurbished: For P8 S814 S824 E850 1400W Power Supply 00RR565 00R566 7001692-J000
$382 .00
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Refurbished: D1U54P-W-1500-12-HB4KC Original Server Network Device Power Supply ...
$398 .00
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Refurbished: 1PCS for Server DPS-550AB-1A DPS-550AB-1A
$250 .00
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Refurbished: For Z2 G3 G4 500W power supply, graphics card 6 + 8P L07304-003 L07304-001
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Refurbished: 1PCS for FSP300-60DL (48V) 300W ATX IPC Server, Power Supply
$338 .00
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Refurbished: 1Pcs for Optiplex7020MT 7010PLUS 3911 3020 3901 Desktop Power Supply ...
$149 .00
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Refurbished: 1Pcs for WEB/SNMP/242100.118 communication power supply, monitoring ...
$206 .00
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$206 .00
Sold by: Nytke team
Refurbished: YM-6521B 520W Original For 3Y Server Redundant Hot-swap Power Supply
$199 .00
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Refurbished: 1Pcs for NF5430P NF520 D2 PWS-1K22A-1R Server Power Module 1200W
$279 .00
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Refurbished: KHACHIMO 1100W Power Supply iMP4-2E-2L-1D-01-A 73-940-6053I
$3,999 .00
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$3,999 .00
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Refurbished: For PWS-1K11P-1R 1010W Redundant Power Module PWS-1K11P-1R
$353 .00
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Refurbished: For 23-0000067-01 psu2000w dcx-8510 481552-001 ak863A power supply
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Refurbished: For HS12 802827J 8028PAA Blade Server BladeCenter HS12
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Refurbished: 1pcs for ZXDD01D2000V5.5 2000W 48V RRU
$433 .00
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Refurbished: KHACHIMO R630 R730XD R740 1600W Power Supply D1600E-S0 095HR5 ...
$329 .00
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Refurbished: 1PCS for 8 pin 290W power supply AC290AM-00 L290AM-00 H290AM-00 ...
$79 .00
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Refurbished: 1PCS for T5220 T5440 X4170 m2 AWF-2DC-760W A236 Power Supply ...
$118 .00
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Refurbished: KHACHIMO 1U 150W Switching Power Supply DPS-150AB-8 A DPS-150AB-8A
$89 .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.