Power Supplies - Showing 2305 - 2328 of 17938 Products

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Refurbished: 80plus Bronze Flex Itx Nas Small 1U 350W Power Supply DPS-350AB-24 C ...
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Refurbished: 1pcs for PSR720-24A GPR720-24A switch power supply
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Refurbished: 1Pcs for NF5280M5M4 server power supply DPS-550AB -11A 550W
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Refurbished: KHACHIMO 80plus Gold IPC 1U 500W Switching Power Supply SS-500L1U
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Refurbished: For GIN-3500V GIN-3600V GIN-3800V
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Refurbished: KHACHIMO 3060 3080 7050 3990 3991 6Pin 260W D260EBM-00 JJ4YW ...
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Refurbished: KHACHIMO 600W Power Supply PS-4601-1 PS-4601-1HD M9769-011 ...
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Refurbished: For 260W 10 Pin Power Supply PA-2261-1 HK280-72PP FSP180-20T PA-2181
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Refurbished: X3300 M4 FSB013 94Y8056 94Y8057 94Y8082 460W Cold Power Generation
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Refurbished: 1pcs for 300-1666-01 300-1906 300-1583 B1500 Power Supply EPAP-420 ...
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Refurbished: 1PCS for T350 G7 T280 G3 Server Power Supply DPS-700FB E 700W
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Refurbished: For XP Power P5S6S6-FT5 Switching Power Supply
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Refurbished: ABL1RPM24100 240W Simplex AC/DC Manual Switch Output 24V 10A ...
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Refurbished: 1PCS For TL2000/4000 tape drive power supply 0FW760 KM80/FL/E/C
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Refurbished: R310 Server Power Supply L350E-S0 DPS-350AB-11 A R109K T134K
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Refurbished: DPS-400AB-16 A For Advantech Industrial Power Supply 400W
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Refurbished: KHACHIMO 380 388 G6 G7 G8 460W Power Supply DPS-460MB A HSTNS-PD28 ...
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Refurbished: PSUF-DC CR5B2PWRDC00 DC Power Module NE20E-S2E 10A
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Refurbished: For AG637 EVA4400 Power Supply DPS-600PB-1 A 5697-6118 435740-001
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Refurbished: For JWE-3612 CONT./DISPLAY
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Refurbished: C79451-Z1584-K1 ME200S2CCCV10 Power Supply SPW1461
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Refurbished: For PE2800 Power Supply 7000815-0000 D3014 GD418
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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.