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MW Mean Well RS-50-3.3 3.3V 10A 33W Single Output Switching Power Supply
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Power-One HTAA-16W-AG Power Supply; AC-DC; 5V@2A, 12V@0.4A, -5V@0.4A; 100-264V ...
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CableMod C-Series Pro ModFlex Sleeved Cable Kit for Corsair RM Black Label/RMi/RMX (Black ...
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TOPOWER TOP-400W 400W ATX12V / EPS12V 80 PLUS BRONZE Certified Active PFC Power ...
$54 .99
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PC5204 Powerseries 1 amp power supply module w/ 4 outputs
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BOGEN - AVAD PRS48 48V DC Power Supply
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MEAN WELL LED Driver Single Output Switching Power Supply - Output Voltage and Current ...
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MEAN WELL original RSP-150-24 24V 6.3A meanwell RSP-150 24V 151.2W Single Output with ...
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MW Mean Well DR-4524 24V 2A 45W Single Output Industrial DIN Rail Power Supply
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CableMod C-Series Pro ModMesh Sleeved 8-pin PCI-e Cable for Corsair RM Black ...
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HP 403777-001 Power Supply - 200 Watt For Dc7700 Usdt Ultra Slim Desk
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Dell ATX12V Power Supply
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FOR DELL 300 Watt Compatible Power Supply Replacement Inspiron 518 519 530 531 537 540 ...
$59 .99
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TS-200-148A DC to AC Inverter 48VDC 100VAC/110VAC/115VAC/120VAC 200W True Sine ...
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YOOPKA Switching Power Supply Small Volume 12V 40A 480W Switching Power Supply Driver ...
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Dell Wu133 Dell 305 Watt Power Supply For Optiplex 760 960 Mt
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MW Mean Well GS120A24-P1M 24V 5A 120W AC-DC Green Industrial Adaptor
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N300V5-C G-Energy Best Price 5V 60A 300W Power Supply N300V5.0-C
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HP 796349-001 ProDesk 600 G2 200W 4-Pin 12v Power Supply
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TOPOWER 1800W Fully Modular GPU Mining Power Supply For BTC/BCH/ETC/ETH/LTC/ ...
$219 .99
HPE HP JC680A 650W AC Power Supply Unit PSU
$190 .78
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IBM 24R2567 Power Supply - 225 Watt For Thinkcentre Series PC's
$58 .20
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Seasonic Focus GM-550, 550W 80+ Gold, Semi-Modular, Fits All ATX Systems, Fan Control in ...
$306 .99
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SilverStone Technology ST1200-PT 80 Plus Platinum 1200W Fully Modular ATX/PS2 Power ...
$666 .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.