Power Supplies - Showing 673 - 696 of 18771 Products

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FSP Group FSP300-60GHT 300 W TFX12V 80 PLUS Certified Active PFC Power Supply
$149 .00
HP JL086A X372 54VDC 680W PS 680 Power Supply JL086A#ABA
$283 .00
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HP JC087A AC Power Supply
$458 .00
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HPE 5400R 1100W POE+ ZL2 Power Supply
$510 .00
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Hpe X362 720W 100-240Vac To 56Vdc Poe Power Supply
$478 .70
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TDK-Lambda JWS150-28/A JWS 5.5A 63Hz Switching Power Supplies
$249 .00
GIGABYTE P650B GP-P650B 650 W Intel Form Factor ATX 12V v2.31 80 PLUS BRONZE Certified ...
$88 .86
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ASUS TUF GAMING 550W Bronze PSU, Power Supply, Axial-tech Fan Design, Dual Ball Fan ...
$84 .99
Addon ADD-QHPQDE-AOC7M Hp Jl287A To Dell 332-1364-Aoc Compatible Taa Compliant ...
$531 .69
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Siig Nn-400P33 Firewire 3-Port Pci Siig
$79 .25
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CableMod C-Series Pro ModMesh Sleeved 8-pin PCI-e Cable for Corsair RM Yellow ...
$180 .99
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$180 .99
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Best Shopper - Replacement Power Supply 661-7886 Compatible With iMac 27'' (Late ...
$212 .99
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HitLights 24 Watt (2 Amp) LED Power Supply 110V AC to 12V DC Transformer UL-Listed Lighting ...
$50 .99
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$50 .99
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New 110-230V 400W PSU 80Plus Bronze SFX Micro Full Module Professional E-Sports ...
$113 .99
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$113 .99
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REVO America R12VPWR1TO4 4 Channel 12V Power Supply (Black)
$50 .99
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Streacom ST-NANO120 Nano PSU 120watt, AC-DC Adapter, Internal PSU
$209 .99
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SilverStone Technology ST1500-TI, 80 Plus Titanium 1500W Fully Modular ATX/PS2 Power ...
$900 .99
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PFC Function Enclosed 312W 24V 13A SP-320-24 Meanwell AC-DC Single Output SP-320 MEAN ...
$195 .99
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Rotolight Spare Power Supply for AEOS
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Enclosed Type 102W 12V 8.5A SE-100-12 Meanwell AC-DC SMPS SE-100 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.