Power Supplies - Showing 2185 - 2208 of 17937 Products

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Refurbished: KHACHIMO ML350e G8 460W Switching Power Supply DPS-460DB-6 A ...
$299 .00
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Refurbished: 1PCS for FSP180-50PLA cash register POS machine power supply 1U
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Refurbished: PE1850 Server Power Supply PS-2521-1D 550W 0WJ829 0UG634
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Refurbished: KHACHIMO For FSP 520W Switching Power Supply SPR1C520
$649 .00
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Refurbished: 1Pcs for VOSTRO 23 3340 9010 5348 Integrated small power supply ...
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Refurbished: KHACHIMO DS4700 600W Switching Power Supply DPS-600QB A 42D3346 ...
$439 .00
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Refurbished: KHACHIMO PMC 24V6.25A 150W Power Supply PMC-24V150W2AA
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Refurbished: 550W Switching Power Supply 06FKHH 6FKHH DPS-550LB N
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Refurbished: 1Pcs for P1S-2300V-R Redundant Power Supply Module P1S2-5300V4V 300W
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Refurbished: 1PCS for PA-1181-10AC power supply 180 watts [6 pins + 4 pins]
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Refurbished: 1PCS for YM-6521B YM-6521BAR Server, Power Module 520W
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Refurbished: For EVM-5004-10 Disk Array Hard Disk Cabinet Power Supply
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Refurbished: 100-240VAC ±15V/4A Power Supply ASM60-15
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Refurbished: 1PCS for FSP700-80PSA 700W server power supply
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Refurbished: KHACHIMO DPS-200PB-184 D 0X3X6 DPS-200PB Industrial Server Power ...
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Refurbished: 1Pcs for MPD-830C industrial control power supply 300W 24V input ...
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Refurbished: KHACHIMO LED Power Supply For MOSO 228-457V 320W Power Supply ...
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Refurbished: KHACHIMO Small 1U 16Pin 150W Power Supply ACE-816AP-L
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Refurbished: KHACHIMO POWEREX SPC-S350 REX-S350 Industrial Control Power Supply
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Refurbished: PLA30F-24 INPUT AC100-240V 50-60Hz 0.7A OUTPUT 24V 1.3A AC/DC 30W ...
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Refurbished: KHACHIMO FLEX POS Small 1U Rated 400W Peak 500W Switching Power Supply ...
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Refurbished: For FSP235-60GT FSP400-60ATV (PF) FSP400-601UE FSP700-50UEB Power ...
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Refurbished: 1Pcs for H2500A2-VB 42-56VDC/0-50A Communication Power Supply ...
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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.