Power Supplies - Showing 1081 - 1104 of 11992 Products

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503376-001 240W Power Supply Unit for HP Elite 8000 8100 8200 SFF Pro 6000 6005 6200 ...
$54 .99
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$54 .99
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BitFenix Formula 80 Plus Gold Standard ATX PSU 750W BF-750G, BP-FM750ULAG-7R
$126 .99
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Seasonic FOCUS Plus 650 Platinum SSR-650PX 650W 80+ Platinum ATX12V & EPS12V Full ...
$252 .99
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EPower Technology TOP-150A1 150W Topower Slim At 6Pin P8/P9 Brown Box
$159 .99
ePOWER EP-650-TD1 650 W ATX12V Active PFC Power Supply
$54 .99
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723595-101 HP 500W PLATINUM HOT-PLUG PS KIT
$103 .26
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$103 .26
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New Genuine 320W KDM Power Supply
$86 .99
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Altronix Phenolic or Fiberglass Power Supply 6/12/24VDC @ 4A - SMP5
$144 .99
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RAIDMAX Vortex 500W ATX 12V v2.3 / EPS 12V SLI Ready Crossfire Ready 80 Plus Bronze ...
$99 .99
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PWR SUPPLY, 250W, P/N: 152769-001, REV.G, 153652-004
$59 .99
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$59 .99
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HP 540W AC Power Supply
$100 .88
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Enclosed Type 108W 24V 4.5A NES-100-24 Meanwell AC-DC Single Output NES-100 Series ...
$74 .99
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[PowerNex] Mean Well QP-320D 5V +/-12V 24V 2A 3A 10A 20A 316W Quad Output with PFC ...
$364 .99
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1-468-417-71 Sony Power Supply For Pcv-Rx450 And Pcv-Rx460
$84 .78
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MW Mean Well GS120A24-P1M 24V 5A 120W AC-DC Green Industrial Adaptor
$99 .99
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Dell Wu133 Dell 305 Watt Power Supply For Optiplex 760 960 Mt
$57 .13
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Valcom Wall Rack or Wall Mount 600 mA Power Supply
$118 .99
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MEAN WELL NDR-120-24 Single Output Industrial DIN Rail Power Supply, 24 Volts 5 Amps 120 ...
$60 .99
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LED Driver 90W 24V 3.75A LPF-90-24 Meanwell AC-DC SMPS LPF-90 Series MEAN WELL ...
$108 .99
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Silverstone Strider Platinum ST55F-PT 80 Plus Platinum Certified 550W ATX Power Supply, ...
$290 .99
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CableMod C-Series Pro ModMesh Sleeved Cable Kit for Corsair RM Black Label/RMi/RMX ...
$180 .99
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YOOPKA Switching Power Supply Small Volume 12V 40A 480W Switching Power Supply Driver ...
$136 .99
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Mean Well SD-100C-24 Enclosed Converter, 24V, 4.2A, 100.8W, 7 pins, 1.6" H x 3.9" W x 7.8" ...
$73 .99
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Magtech M18-U54-0350 350Ma Con. Cur. 32-54Vdc 20W, LED Dimmable 7264
$59 .99
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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.