Power Supplies - Showing 1105 - 1128 of 11999 Products

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TP-Link TL-FC311A-20 | Gigabit WDM SFP to RJ45 Fiber Media Converter | Fiber to Ethernet ...
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Seasonic FOCUS Plus 650 Platinum SSR-650PX 650W 80+ Platinum ATX12V & EPS12V Full ...
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Enclosed Type 1000.8W 24V 41.7A SE-1000-24 Meanwell AC-DC SMPS SE-1000 Series MEAN ...
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Intermec 851-082-203 Universal Power Supply for Handheld Computer, 12 VDC, 50W
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Smartbuy 1000W LED Fan Silent PC ATX Power Supply PSU SATA 12V PCI-E w/Auto Fan Speed ...
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EPower Technology TOP-150A1 150W Topower Slim At 6Pin P8/P9 Brown Box
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Smartbuy 1000W LED Fan Silent PC ATX Power Supply PSU SATA 12V PCI-E w/Auto Fan Speed ...
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MW Mean Well RS-100-5 5V 16A 80W Single Output Switching Power Supply
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Enermax Marblebron 850W aRGB White Power Supply, 80 Plus Bronze, Semi-Modular PSU, ...
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Dell OptiPlex 780 790 9010 7010 USFF 180 Watt Power Supply L180EU-00 F180EU-00 ...
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Pwr 19V 65W Power Supply for Intel NUC FSP065-10AABA: UL Listed Extra Long 12Ft Cord Power ...
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Seasonic FOCUS GX-750, 750W 80+ Gold, Full-Modular, Fan Control in Fanless, Silent, and ...
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Sony MJPC-270A1 Nmb PC 268.9W Power Supply Psu 3H1
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Enclosed Type Security Power Supply 151.55W AD-155B Meanwell AC-DC MEAN WELL Dual ...
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MeanWell DR-15-15 15W 15V 1A Din-Rail Power Supply 100-240VAC-DC15V
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Seasonic S12III 650 SSR-650GB3 650W 80+ Bronze ATX12V & EPS12V Direct Cable Wire ...
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19.5V 12.31A 240W DA240PM190 HA240PM190 0PHF5J LA240PM190 AC Adapter For Dell ...
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Whatsminer P222B Power Supply, 96% Power Efficiency PSU for 14V Whatsminer Miner Mining ...
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503376-001 240W Power Supply Unit for HP Elite 8000 8100 8200 SFF Pro 6000 6005 6200 ...
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Tycon Systems PS48V-2.5 120W Power Supply with 4 Pin Mini Din Connector - 48V44; 2.5A
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Tyco Electronics 300-1817-03 Sun Server 450W Power Supplies A208
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CableMod C-Series Pro ModFlex Sleeved 8-pin PCI-e Cable for Corsair RM Yellow ...
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271352-002 HP Power Supply - 250 Watt Non Pfc
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MEANWELL CLG-100-20 LED Switching Power Supply Driver, 100w 20v
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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.