Power Supplies - Showing 1201 - 1224 of 18350 Products

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HP 866726-001 Power Supply 1U 12V 500W noAux - Mixing of Power Supplies in The Same ...
$108 .99
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Zeus GAMDIAS RGB Gaming PC Power Supply 750W 80 Plus Bronze Certified 750 Watt PSU for ...
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1800W Mining Power Supply Support 8 GPUs GPU Mining Rig, for ETH Bitcoin Ethereum Miner ...
$126 .99
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Desktop Industrial Adapter 102W 12V 8.5A GST120A12-R7B Meanwell AC-DC SMPS ...
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Sparkle Power 150W Power Supply - 150 W
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Modular Medical Adapter 21.6W 12V 1.8A PM-20-12 Meanwell AC-DC SMPS PM-20 Series ...
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48V Universal Power Supply
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Gateway 6500345 Power Supply 200W E4400 Gateway
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2600W Mining Power Supply Support 8 GPUs GPU Mining Rig, ETH Miner, Active PFC, PC 2000W ...
$144 .99
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ePOWER EP-600-TD2 600 W ATX12V Power Supply
$54 .99
LED Power Supplies 30W 15V 2A LED Power Supply
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G300V5 G-Energy Best Price 5V 60A Power Supply G300V5
$106 .99
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PSU for ML110 G7 350W Power Supply 629051-001 644744-001 S10-350P1A
$372 .99
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TP-Link TL-FC111PB-20 | 10/100 Mbps WDM SFP to RJ45 Fiber to Ethernet Media Converter ...
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Seasonic Focus GM-550, 550W 80+ Gold, Semi-Modular, Fits All ATX Systems, Fan Control in ...
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Dell P9550 Dell 280 Watt Power Supply For Optiplex 330 740 745 755 Dimension C521-P9550
$88 .95
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N300V5-C G-Energy Best Price 5V 60A 300W Power Supply N300V5.0-C
$68 .99
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MW Mean Well GS120A24-P1M 24V 5A 120W AC-DC Green Industrial Adaptor
$99 .99
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HP 412211-001 700W Hot-Plug Power Supply Proliant DL360 G5 DL365 G1 Servers
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MW Mean Well HLG-240H-24A 24V 10A 240W Single Output LED Switching Power Supply
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Altronix AL168CB Power Supply,Outputs 8,Amps 6
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IBM 24R2567 Power Supply - 225 Watt For Thinkcentre Series PC's
$58 .20
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CableMod C-Series Pro ModFlex Sleeved 8-pin PCI-e Cable for Corsair RM Black ...
$180 .99
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L-Com Poe Injector with Integral Power Supply - PS4820-POE-1
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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.