Power Supplies - Showing 1321 - 1344 of 11996 Products

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ePOWER EP-600-TD2 600 W ATX12V Power Supply
$54 .99
48V Universal Power Supply
$71 .99
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$71 .99
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Gateway 6500345 Power Supply 200W E4400 Gateway
$87 .54
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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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Line 6 DC-1g | 9v DC 500mA Power Supply for XDS-Plus XDR95 Relay G30 G50 G90 XD-V70/30 ...
$90 .99
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$90 .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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Compaq - EVO D500/D510 Powersupply - 244163-001
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BOSCH SECURITY VIDEO UPA-1220-60 AC Adapter (1A, 60Hz) for CCTV Systems
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Airgoo Addressable RGB PSU Cable, 24 Pin ATX Cable Extension Kit, with Diffused Lighting, ...
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CableMod E-Series Pro ModMesh Sleeved 8-pin PCI-e Cable for EVGA G5 / G3 / G2 / P2 / T2 ...
$180 .99
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Mpw2801 Pcps0939 Power Supply Board
$19 .79
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ALTRONIX OLS180 12/24VDC 6A PWR-SPLY CHRGR-BRD
$316 .99
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PWS-2K03P-1R Power Supply 2000W Module W/ PFC
$1,440 .00
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CableMod C-Series Pro ModFlex Sleeved Cable Kit for Corsair RM Yellow Label/AXi/HXi (Black ...
$180 .99
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EnGenius 480W Open Frame Power Module
$279 .99
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Odyson - Power Supply (185W) Replacement for iMac 21.5" A1418 (Late 2012-Mid 2017)
$189 .99
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HK375-13FP HU275AM-00 L275AM-00 AC275AM-00 H275AM-00 for 790 990 7010 9010MT ...
$148 .99
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Morex 60W Power Supply Kit: 20-pin ATX DC-DC Board with 60W AC-DC Adapter
$108 .99
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Genuine Power Supply 250 Watt 20 Pin Atx Zinfandel
$31 .53
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Compaq - EVO D500/D510 POWER SUPPLY - 243894-001
$101 .99
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Disassemble PSU for 10-pin TFX Power Supply FSP180-20TGBAA FSP180-20TGBAB MAX ...
$125 .99
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Dell Optiplex 780 USFF Computer Power Supply K350R PS-3181-9DA 180W
$54 .95
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POINWER H240AS-01 H240AS-00 L240AS-00 2TXYM 3WN11 240W Optiplex 7010 SFF Power ...
$56 .99
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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.