Power Supplies - Showing 889 - 912 of 11998 Products

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PSU for 180W SFF Power Supply PS-4181-7 DPS-180AB-20 A PCE019 793073-001 ...
$113 .99
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Compaq - EVO D500/D510 Powersupply - 244163-001
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Dell Mx838 488 Watt Power Supply For Powervault Md3000
$63 .54
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LED Power Supplies 30W 15V 2A LED Power Supply
$66 .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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12V8A 24V4A Desktop Power Supply with high Efficiency and Sufficient Power for Stable use ...
$89 .99
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SOLA SLS-24-012T Regulated Power Supply 24VDC T38970
$229 .99
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MW Mean Well EPP-200-15 15V 13.4A 200W Single Output with PFC Function Power Supply
$141 .99
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MEAN WELL NDR-120-24 Single Output Industrial DIN Rail Power Supply, 24 Volts 5 Amps 120 ...
$362 .99
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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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Enermax MaxTytan 80+ Titanium Certified Full Modular 1050W Power Supply with Amazing ...
$648 .99
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MW Mean Well LPV-100-24 24V 4.2A 100W Single Output LED Switching Power Supply
$81 .99
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48V Universal Power Supply
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PSU for ML110 G7 350W Power Supply 629051-001 644744-001 S10-350P1A
$372 .99
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Line 6 DC-1g | 9v DC 500mA Power Supply for XDS-Plus XDR95 Relay G30 G50 G90 XD-V70/30 ...
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HP 613762-001 PS-4241-9HB Proprietry Power Supply
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174048-001 Compaq Power Supply - 145 Watt Atx For Presario
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MW Mean Well HLG-60H-36A 36V 1.7A 60W Single Output LED Switching Power Supply
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Dell Vmrd2 Dell 240 Watt Power Supply For Optiplex 790 990 Sff
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IBM AcBel API3FS25 585W Hot Swap Power Supply 24R2640 24R2639
$68 .87
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Power Supply for DELL 6FG9T Optiplex 7010 USFF F200EU-00 D-0200ADU00-301
$28 .98
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MW Mean Well DRP-480-24 24V 20A 480W Single Output Industrial DIN RAIL with PFC Function ...
$274 .99
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MW Mean Well PM-20-3.3 3.3V 4.5A 14W Green Open Frame Single Output Switching Power ...
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Switching Power Supply - 110-240Va
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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.