Power Supplies - Showing 241 - 264 of 11994 Products

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Super Flower Combat DB 750W ATX 3.1, 80+ Bronze, 5 Years Warranty, Flexible Flat Cables, ...
$79 .99
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Thermaltake Toughpower GT 750W ATX 3.1 Snow Standard Power Supply; 80 Plus Gold ...
$99 .99
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Rosewill CMG5 1200W, ATX 3.0 & 3.1 Compatible, 80+ Gold 1200W Full Modular Power Supply, ...
$119 .99
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Thermaltake Toughpower GT 850W ATX 3.1 Snow Standard Power Supply; 80 Plus Gold ...
$114 .13
Corsair CX650M (2025) Semi Modular ATX 3.1 PCIe 5.1 Low-Noise 650W Power Supply with ...
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Rosewill CMG5 1000W, ATX 3.0 & 3.1 Compatible, 80+ Gold 1000W Full Modular Power Supply, ...
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$119.99
$99 .99
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SilverStone SX700-LPT 700W (Peak 750W) SFX-L 80 PLUS PLATINUM Certified Active ...
$169 .99
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Lian Li SX Platinum 1200W SXP Compact ATX Form Factor Power Supply w/ 12V-2x6 Cable - ATX ...
$159 .99
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CORSAIR CX Series CX750 80 PLUS Bronze ATX Power Supply
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Rosewill CMG 850W, ATX 3.0 & 3.1 Compatible, 80+ Gold 850W Full Modular Power Supply, ...
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$99.99
$79 .99
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CORSAIR CX Series CX550 80 PLUS Bronze ATX Power Supply
$72 .99
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Thermaltake Toughpower GT 750W ATX 3.1 Standard Power Supply; 80 Plus Gold Efficiency; ...
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$91.99
$84 .99
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MSI MAG A750BN PCIE5 III, Non-Modular Compact Gaming 750W Power Supply, 80+ Bronze, ...
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$79.99
$69 .99
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Thermaltake Toughpower GT 850W ATX 3.1 Standard Power Supply; 80 Plus Gold Efficiency; ...
$109 .99
CORSAIR CX-M CX750M 750 W ATX 80 PLUS BRONZE Certified Semi-Modular Power Supply
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$81.99
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silverstone sx750 platinum, 750w sfx fully modular 80 plus platinum power supply, ...
$161 .99
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SAMA P1000W ATX 3.1 Power Supply, 1000W 80 PLUS & Cybenetics Platinum certification, ...
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$134.99
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Thermaltake Toughpower PT 1000W; ATX 3.1; Native PCIe 5.1 12V-2x6; Etched Flat Cables; ...
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Thermaltake Toughpower SFX 850W 80Plus Platinum; 450W 12V-2x6 Connector Included; ...
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$186.99
$176 .99
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Cooler Master MWE Gold 750 V3 Fully Modular Power Supply - 750W 80+ Gold Certified PSU, ...
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$99.99
$79 .99
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SAMA P850W ATX 3.1 Power Supply, 850W 80 PLUS Platinum, PCIE 5.1 Ready, Full Modular, ...
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$119.99
$103 .99
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Lian Li SP Platinum 1000W SFX Form Factor Power Supply with 12V-2x6 Connectors - ATX 3.1 & ...
$184 .99
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Rosewill VSB 850W 80+ Bronze, ATX 3.0 & 3.1 Compatible, Semi-Modular Power Supply, PCIe ...
$79 .99
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Thermaltake Toughpower SFX 1000W 80Plus Platinum ATX 3.1 600W 12V-2x6 Connector ...
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$199.99
$179 .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.