Power Supplies - Showing 697 - 720 of 11999 Products

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ASUS TUF GAMING 550W Bronze PSU, Power Supply, Axial-tech Fan Design, Dual Ball Fan ...
$84 .99
GIGABYTE P650B GP-P650B 650 W Intel Form Factor ATX 12V v2.31 80 PLUS BRONZE Certified ...
$109 .00
MEAN WELL MW NES-150-24 24V 6.5A 156W Single Output Switching Power Supply
$81 .99
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$81 .99
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Seasonic PRIME 750 Titanium SSR-750TR 750W 80+ Titanium ATX12V & EPS12V Full Modular ...
$356 .99
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$356 .99
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Altronix Proprietary Power Supply OLS75
$193 .99
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$193 .99
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Enclosed Type Security Power Supply 51.38W AD-55A Meanwell AC-DC MEAN WELL Dual ...
$97 .99
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CableMod E-Series Pro ModFlex Sleeved 8-pin PCI-e Cable for EVGA G5 / G3 / G2 / P2 / T2 (Black ...
$180 .99
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ALTRONIX BC300 GREY ENCLOSURE W/CAM LOCK FITS UP TO (2) 12VDC/7AH BATT.
$190 .99
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ePOWER EP-550P5-T1 550 W ATX12V SLI Ready Modular Power Supply
$69 .99
304231-001 Compaq Power Supply 75 Watt For Presario 4000, 4500, 4504
$68 .87
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Emacs R2W-6460P-R Server Rackmount Power Supply
$198 .99
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$198 .99
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HD437 DELL PV220 POWER SUPPLY 600W
$73 .14
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TOPOWER TOP-500D 500W EPS12V / ATX12V SLI Ready CrossFire Ready 80 PLUS BRONZE ...
$59 .99
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XP POWER - VEC40US15 - AC/DC Power Supply, 1 Output, 40 W, 15 V, 2.67 A
$72 .99
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$72 .99
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[PowerNex] Mean Well DRH-120-48 24V 5A 120W Single Output Industrial DIN RAIL Power ...
$160 .99
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$160 .99
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DC 24V 5A Switching Power Supply. Good for Water Pump
$63 .99
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ATHENA AT40 400W AT POWER SUPPLY Athena Computer Power AP-AT40 400W AT power ...
$97 .99
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Morex 60W / 80W DC-DC Power Supply Board,12V, 20-pin ATX, Mini-ITX, MX-0608
$72 .99
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Silverstone Tek 80 Plus Bronze Certified Active PFC Power Supply ATX12V 500W Power Supply ...
$101 .99
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BOGEN PRS40C Power Supply PI-41-71D
$55 .99
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MW Mean Well HLG-240H-24 24V 10A 240W Single Output LED Switching Power Supply
$154 .99
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$154 .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.