Power Supplies - Showing 673 - 696 of 11996 Products

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Juniper EX-PWR3-930-AC 930 W AC Power Supply with PoE+ Capability
$71 .00
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HPE Aruba X371 12VDC 250W 100-240VAC Power Supply (JL085A)
$277 .00
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HP AC Power Supply
$134 .00
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HEWLETT-PACKARD JL085A#ABA HP X371 12VDC 240W 100-240VAC Power Supply
$277 .00
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HP JG544A#ABA X362 720W AC POE POWER SUPPLY
$479 .00
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750W Power Supply for DELL FN1VT Precision R510
$18 .97
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Aruba X371 12VDC 250W PS Aruba X371 12VDC 250W PS UK en
$277 .00
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Juniper UNIV-250W-PS-AC 250W AC Power Supply
$599 .00
NEW EVGA SuperNOVA 1600 G+ 220-GP-1600-X1 Modular Power Supply ATX 80 Plus Gold
$598 .00
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HPE ProCurve 1500W AC Power Supply
$438 .00
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HP ProCurve 1500W AC Power Supply
$438 .00
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HP J8713A 1500W AC Power Supply. PROCURVE SWITCH ZL 1500W POWER SUPPLY SW-CP. ...
$298 .00
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HP JL087A#ABA ARUBA X372 54VDC 1050W PS
$386 .00
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Aiphone IS-PU-UL 48VDC 100-240VAC 120W Power Supply
$399 .00
FSP Group FSP300-60GHT 300 W TFX12V 80 PLUS Certified Active PFC Power Supply
$149 .00
TDK-Lambda PFE1000F-48 48V 21A 85-265VAC 1008Watt PFE Power Supply
$379 .00
HP 1500W Proprietary Power Supply Power Supply
$438 .00
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SEASONIC SS-520H1U 520-watts Industrial 1U Rackmount -Active PFC Power Supply
$269 .00
Power-One PFC250-1015F 250 Watt Power Factor Correction Power Supply
$339 .00
HPE JD217A AC Power Supply
$134 .00
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Emacs R2W-6501P-R 500 watts Swap Power Supply
$199 .00

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.