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Great Wall GW800 80 Plus Gold Fully Modular 800W Power Supply, 140mm Ball Bearings ...
$192 .99
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FSP Hydro PTM Pro 750W 80 Plus Platinum Full Modular ATX 12V Power Supply (HPT2-750M)
$159 .99
FSP Hydro Ti PRO 1000W, ATX3.0 & PCIe 5.0(Gen 5) , 80 Plus Titanium Power Supply ...
$349 .99
1800W Rated Miner Power Supply 95% High Efficiency AC 90V-260V ATX Mining Power Source ...
$254 .72
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1800W ATX Computer Switch Power Supply PSU 1600W Power Supply Switching Pc Gaming Psu ...
$190 .62
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220W Full Voltage Desktop Power Supply For D2201C0 504965-001 PC8044 TFX0220D5WA ...
$82 .91
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SAMA XP 1000w ATX Power Supply PSU For Gaming Computer PC Power Supply Unit - 80 Plus ...
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2400W ASIC Miner Power Supply For Platform B85 847 PSU 12V Mining Power Supply A10pro ...
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1200W Miner Switching Power Supply for GPU Rig Mining BTC ETH Ethereum 1200W ...
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2000W Mining Power Supply 2000W PSU ETH Mining Rig Power Source GPU PSU with 10*PCI ...
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APEVIA SFX-AP400W 400 W SFX Power Supply
$99 .99
Segotep 850W ATX 3.0 Power Supply, Full Modular 80 Plus Gold, PCIe 5.0 12+4PIN port and ...
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SilverStone SST-ST1300-TI 1300 W ATX12V 80 PLUS TITANIUM Certified Active PFC Power ...
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$410 .99
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High-Efficiency PSU 1800W Power Supply 6PIN*10 Support Antminer S9 T9 A7 D3 L3 BTC Miner ...
$167 .99
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2000W Mining Machine Power Supply With EMC 14CM Fans Active PFC PSU For Bitcoin Machine ...
$169 .19
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Power Supply For HP D10-320P2A PS-4321-9HA HP-D3201A0 CFH0320AWWA PSU Adapter ...
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2400w High Efficient 2500W Mining Psu 2500W Power Supply Antminer Psu Computer Power ...
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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.