Power Supplies - Showing 1273 - 1296 of 11992 Products

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Dell OptiPlex 780 790 9010 7010 USFF 180 Watt Power Supply L180EU-00 F180EU-00 ...
$48 .93
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Intermec 851-082-203 Universal Power Supply for Handheld Computer, 12 VDC, 50W
$80 .99
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$80 .99
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Airgoo Addressable RGB PSU Cable, 24 Pin ATX RGB Cable Extension Kit with Customized ...
$72 .99
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Whatsminer P222B Power Supply, 96% Power Efficiency PSU for 14V Whatsminer Miner Mining ...
$630 .99
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CableMod C-Series Pro ModFlex Sleeved 8-pin PCI-e Cable for Corsair RM Yellow ...
$180 .99
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Sony MJPC-270A1 Nmb PC 268.9W Power Supply Psu 3H1
$95 .55
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IBM 00K8468 Power Supply 95 Watt For Use With Aptiva Model 2153 & Oth
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MW Mean Well PB-300P-24 28.8V 10.5A Single Output Battery Charger
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CableMod C-Series Pro ModFlex Sleeved 8-pin PCI-e Cable for Corsair RM Yellow ...
$180 .99
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Logisys New PC Power Supply Upgrade for Compaq Presario SR5703WM (NC783AA) ...
$49 .99
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Power Supply for Optiplex GX Series Models With M
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Rotolight spare Power Supply for use with NEO and NEO 2
$70 .99
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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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LED Driver 60W 12V 5A HLG-80H-12A Meanwell AC-DC SMPS HLG-80H Series MEAN WELL ...
$114 .99
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MW Mean Well SP-240-24 24V 10A 240W Single Output with PFC Function Power Supply
$148 .99
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LED Driver 60W 5V 12A LPV-100-5 Meanwell AC-DC SMPS LPV-100 Series MEAN WELL C.V Power ...
$83 .99
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Power Supply (225W, Dmo, Worldwide)Thinkcentre M55 * Si *
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DC Power Supply, 24VDC, 3.1A, 50/60Hz
$177 .99
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280W Power Supply Replacement for Dell Optiplex GX520 GX620 740 745 755 210L 320 330/ ...
$90 .99
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PSU for RX200S7 RX200S8 RX300S7 RX300S8 Module Power Supply DPS-450SB A MAX 450W
$120 .99
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Odyson - Power Supply 205W Replacement for iMac 21.5" A1311 (Late 2009-Late 2011)
$211 .99
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CableMod C-Series Pro ModMesh Sleeved Cable Kit for Corsair RM Yellow Label/AXi/HXi ...
$180 .99
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CableMod RT-Series Pro ModMesh Sleeved Cable Kit for ASUS and Seasonic (Black/Red)
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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.