Power Supplies - Showing 793 - 816 of 18762 Products

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12V8A 24V4A Desktop Power Supply with high Efficiency and Sufficient Power for Stable use ...
$89 .99
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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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HP 866726-001 Power Supply 1U 12V 500W noAux - Mixing of Power Supplies in The Same ...
$108 .99
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220W Power Supply Unit for HP Pavilion Slimline S5 S5-1xxx TouchSmart 310-1205la ...
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Dell R224M 235-Watt Power Supply
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HP 613763-001
$51 .80
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Odyson - Power Supply 205W Replacement for iMac 21.5" A1311 (Late 2009-Late 2011)
$211 .99
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Altronix AL300ULX Power Supply Charger, Single Class 2 Output, 12/24VDC @ 2.5A, 115VAC
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The620Guy Power Man IP-P300DF1-0 300 Watts 300W ATX12V Desktop Switching Power ...
$133 .99
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Dell 3WFNF Inspiron 540S/545S 250W 24-Pin Desktop Power Supply
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280W Power Supply Replacement for Dell Optiplex GX520 GX620 740 745 755 210L 320 330/ ...
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IBM System x 550W High Efficiency Platinum AC Power Supply 94Y6668
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MEAN WELL LRS-350-12 DC Switching Power Supply 12V 29A 350W for CCTV, Computer ...
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Power Supply 600W 80+ Bronze Certified PSU (ARESGAME, AGW600)
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Dell PW116 ATX12V Power Supply
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LED Driver 60W 5V 12A LPV-100-5 Meanwell AC-DC SMPS LPV-100 Series MEAN WELL C.V Power ...
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Power Supply for Optiplex GX Series Models With M
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MW Mean Well HLG-185H-36A 36V 5.2A 185W Single Output LED Switching Power Supply
$138 .99
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Compaq 163555-001 Power Supply 90W Atx Ipaq
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Computer Parts, Durable PC Power Supply Computer Accessories with Clear for PC(British Flag ...
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MW Mean Well PB-300P-24 28.8V 10.5A Single Output Battery Charger
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HP 593831-B21 750 W AT Common Slot Platinum Power Supply Kit
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SilverStone Technology ST1000-PT, 80 Plus Platinum 1000W Fully Modular ATX/PS2 Power ...
$701 .99
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LED Driver 60W 12V 5A HLG-80H-12A Meanwell AC-DC SMPS HLG-80H Series MEAN WELL ...
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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.