Power Supplies - Showing 1081 - 1104 of 17993 Products

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CableMod RT-Series Pro ModFlex Sleeved Cable Kit for ASUS and Seasonic (Black + White)
$180 .99
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CableMod C-Series Pro ModFlex Sleeved 8-pin PCI-e Cable for Corsair RM Yellow ...
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Dell 3WFNF Inspiron 540S/545S 250W 24-Pin Desktop Power Supply
$47 .53
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MW Mean Well HLG-185H-36A 36V 5.2A 185W Single Output LED Switching Power Supply
$137 .89
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XK376 Dell 305W Power SupplyOptiplex GX, Dimension Tower
$66 .21
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12V (6A) A/C Power Supply to Dual Female D-Tap Outputs (8')
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Power Supply (225W, Dmo, Worldwide)Thinkcentre M55 * Si *
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DC Power Supply, 24VDC, 3.1A, 50/60Hz
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Dell R224M 235-Watt Power Supply
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PSU for RX200S7 RX200S8 RX300S7 RX300S8 Module Power Supply DPS-450SB A MAX 450W
$120 .99
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MEAN WELL LRS-350-12 DC Switching Power Supply 12V 29A 350W for CCTV, Computer ...
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Rotolight spare Power Supply for use with NEO and NEO 2
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CableMod C-Series Pro ModMesh Sleeved Cable Kit for Corsair RM Yellow Label/AXi/HXi ...
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Odyson - Power Supply 205W Replacement for iMac 21.5" A1311 (Late 2009-Late 2011)
$211 .99
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The620Guy Power Man IP-P300DF1-0 300 Watts 300W ATX12V Desktop Switching Power ...
$133 .99
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HP 866726-001 Power Supply 1U 12V 500W noAux - Mixing of Power Supplies in The Same ...
$108 .99
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PSU for ML110 G7 350W Power Supply 629051-001 644744-001 S10-350P1A
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SilverStone Technology ET500-B Silverstone 80 Plus Bronze 500W ATX Switching Power ...
$108 .99
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ePOWER EP-600-TD2 600 W ATX12V Power Supply
$54 .99
2600W Mining Power Supply Support 8 GPUs GPU Mining Rig, ETH Miner, Active PFC, PC 2000W ...
$144 .99
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CableMod C-Series Pro ModFlex Sleeved Cable Kit for Corsair RM Black Label/RMi/RMX ...
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[PowerNex] Mean Well PT-6503 3.3V 5V 12V 1A 6A 61.8W Triple Output with 3.3V output ...
$88 .99
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PSU for 180W SFF Power Supply PS-4181-7 DPS-180AB-20 A PCE019 793073-001 ...
$113 .99
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G300V5 G-Energy Best Price 5V 60A Power Supply G300V5
$106 .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.