Power Supplies - Showing 457 - 480 of 11996 Products

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APC Smart-UPS, SMT2200RM2UC 2U Rack Back-UPS, 1920 VA Backup Battery Power Supply, ...
$2,199 .00
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AXIS T6101 MKII AUDIO I/O
$162 .56
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MSI MAG A750BN PCIE5, Non-Modular Compact Gaming 750W Power Supply, 80+ Bronze, ...
$79 .99
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APC Smart-UPS, SMX1000C 2U Convertible Rack/Tower Back-UPS, 1000 VA Backup Battery ...
$799 .00
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APC Smart-UPS, SMX750C 2U Convertible Rack/Tower Back-UPS, 750 VA Backup Battery ...
$709 .00
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APC Smart-UPS, SMT3000C Tower Back-UPS, 2880 VA Backup Battery Power Supply, 8 x NEMA ...
$1,899 .00
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Replacement Laptop Battery for APPLE MacBook Pro 13in 2020 M1
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Supermicro CPR-2021-2M1 Power Module - 2000 W
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Schneider Electric APCRBC109 UPS REPLACEMENT BATTERY RBC109
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PWR-PSU-320W-FS01
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Tripp Lite SRW9UDP SRW9UDP 9U ENCLOSED WALL MOUNT
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APC Smart-UPS, SMT750RM2UC 2U Rack Back-UPS, 750 VA Backup Battery Power Supply, 6 x ...
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APC Smart-UPS, SMT1000RM2UC 2U Rack Back-UPS, 1000 VA Backup Battery Power Supply, ...
$699 .00
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APC Smart-UPS, SMX1500RM2UC 2U Convertible Rack/Tower Back-UPS, 1440 VA Backup ...
$1,099 .00
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Tripp Lite 150W Power Inverter/Charger for Mobile Medical Equipment - 120V - IEC 60601-1 ...
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Antec HCG1000 PRO P US 1000 W ATX 12V 3.1 80 PLUS PLATINUM Certified Full Modular Active ...
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APC Smart-UPS, SMTL1500RM3UC 3U Rack Back-UPS, 1440 VA Backup Battery Power ...
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APC Smart-UPS, SMTL750RM2UC 2U Rack/Tower Back-UPS, 750 VA Backup Battery Power ...
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Black Box Pro Switching System Plus 120-240 VAC Power Supply Module
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APC Smart-UPS, SMT3000RM2UC 2U Rack Back-UPS, 2880 VA Backup Battery Power Supply, ...
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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.