Power Supplies - Showing 1 - 24 of 19588 Products

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EVGA 600 BQ 110-BQ-0600-K1 600W ATX12V / EPS12V 80 PLUS BRONZE Certified ...
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CORSAIR CXM Series CX550M CP-9020102-NA 550W ATX12V / EPS12V 80 PLUS BRONZE ...
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CORSAIR CX Series CX450 450W ATX12V 80 PLUS BRONZE Certified Active PFC Power Supply
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EVGA SuperNOVA 750 G5, 80+ GOLD 750W, 10 Year Warranty, Power Supply 220-G5-0750-X1
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EVGA SuperNOVA 750 G3 220-G3-0750-X1 750W ATX12V / EPS12V SLI Ready CrossFire ...
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EVGA 500 BR 100-BR-0500-K1 500W ATX12V / EPS12V SLI CrossFire 80 PLUS BRONZE ...
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CORSAIR CXM Series CX450M CP-9020101-NA 450W ATX12V / EPS12V 80 PLUS BRONZE ...
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CORSAIR RMx Series RM650x 2018 CP-9020178-NA 650W ATX12V / EPS12V 80 PLUS GOLD ...
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CORSAIR CX Series CX650 650W ATX12V 80 PLUS BRONZE Certified Active PFC Power Supply
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CORSAIR RMx Series RM750x CP-9020179-NA 750W ATX12V / EPS12V 80 PLUS GOLD ...
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CORSAIR RMx Series RM850x CP-9020180-NA 850W ATX12V / EPS12V 80 PLUS GOLD ...
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EVGA SuperNOVA G3 Series 220-G3-0650-Y1 650W ATX12V / EPS12V SLI Ready CrossFire ...
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CORSAIR TX-M Series TX550M CP-9020133-NA 550W ATX12V v2.4 / EPS v2.92 80 PLUS GOLD ...
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EVGA SuperNOVA 850 G2 220-G2-0850-XR 850W ATX12V / EPS12V SLI Ready CrossFire ...
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EVGA 600 BR 100-BR-0600-K1 600W ATX12V / EPS12V SLI CrossFire 80 PLUS BRONZE ...
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CORSAIR RM Series RM750 CP-9020195-NA 750W ATX12V v2.52 / EPS12V v2.92 SLI Ready ...
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EVGA G3 Series 220-G3-0550-Y1 550W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS ...
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EVGA 100-W1-500-KR 500W ATX12V / EPS12V 80 PLUS Certified Non-Modular Active PFC ...
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Seasonic FOCUS GX-650, 650W 80+ Gold, Full-Modular, Fan Control in Fanless, Silent, and ...
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CORSAIR TX-M Series TX650M CP-9020132-NA 650W ATX12V v2.4 / EPS 2.92 80 PLUS GOLD ...
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EVGA SuperNOVA 850 G3 220-G3-0850-X1 850W ATX12V / EPS12V SLI Ready CrossFire ...
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EVGA SuperNOVA 750 G+, 80 Plus Gold 750W, Fully Modular, FDB Fan, 10 Year Warranty, ...
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EVGA 750 N1 100-N1-0750-L1 750W ATX12V / EPS12V Power Supply
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EVGA 500 GD 100-GD-0500-V1 500W ATX12V / EPS12V 80 PLUS GOLD Certified Non-Modular ...
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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.