Power Supplies - Showing 1273 - 1296 of 11999 Products

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AC110-220v ATX Pc 2000W Power Supply 8 Graphics Card Ethereum ETH BTC Mining Antminer ...
$358 .99
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Polycom INC. Universal Power Supply for CCX 500/600/700. 1-Pack, 48V, 0.52A, NA, and ...
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PWS-602S-1R 1U AC-DC Titanium Power Supply 600W Titanium
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Mean Well LRS-350-24 Switching Power Supply 350.4W 24V 14.6A 115Vac or 230Vac - 2 Pack
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Industrial Open Frame 44.4W 12V 3.7A PS-45-12 Meanwell AC-DC Single Output PS-45 MEAN ...
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PSU for T7920 1400W Power Supply D1400EF-00 H1400EF-00 DPS-1400FB A 2CTMC W2J27
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rolls 24V Power Supply, (PS242)
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COMPAQ 288329-001 110-240VAC INPUT, 45-66HZ - 76 Watts
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MyVolts 9V Power Supply Adaptor Replacement for Crosley CR8005A-OR Turntable - US Plug - ...
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Industrial Open Frame 63.5W PT-65B Meanwell AC-DC Triple Output PT-65 Series MEAN WELL ...
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Whatsminer P21D Miner Power Supply, AC 200V-277V PSU for Whatsminer M10s, M20s, M21s ...
$630 .99
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Raidmax Hybrid 730W ATX12V/ EPS12V Power Supply RX-730SS
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Switching Power Supplies 350.4W 24V 14.6A
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ALTRONIX CCTV Power Supply 8 Fused Outputs 24/28VAC 3.5A 115VAC BC100 Enclosure ...
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MW Mean Well HLG-150H-24A 24V 6.3A 150W Single Output LED Switching Power Supply
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SilverStone Technology Platinum Certified Single +12V Rail ATX Power Supply, PS-ST65F-PT
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TOPOWER TOP-600D 600W EPS12V / ATX12V SLI Ready CrossFire Ready 80 PLUS BRONZE ...
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MAINGEAR Ignition Fully Modular Gaming Power Supply, 80-Plus Platinum Rated PSU (1200 ...
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SparkFun Breadboard Power Supply Stick - 5V/3.3V
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MW Mean Well HLG-80H-12 12V 5A 60W Single Output LED Switching Power Supply
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Power Supply high P Bipolar no Flicker Isolation Certified Constant Current ...
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Gateway 6500457 Gateway 200 Watt Atx Power Supply
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DellOptiplex GX1, GXa, GX110 200 Watt Power Supply - Genuine NPS-200
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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.