Power Supplies - Showing 2089 - 2112 of 17993 Products

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Refurbished: For 00E7160 01AF543 00E7162 2B50 VRA004-0030
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Refurbished: 7932 7816 200W Switching Power Supply DPS-200PB-176D DPS-200PB-176 D
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Refurbished: KHACHIMO Power Supply For PHIHONG 205W Power Supply PSM205-407-2-R
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Refurbished: For SUN X8026A 300-1757-02 V215 V245 X4200 Power Supply ASTEC DS550-3
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Refurbished: X336 Server Power API3FS25 585W 39Y7168 39Y7169 24R2640
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Refurbished: KHACHIMO 600W Power Supply ACE-A160A Work Like New
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Refurbished: T605 Server Power Supply DPS-650NB A D650P-S0 0HU666
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Refurbished: 1PCS 764W For J4410 J4440 Power Supply 300-2276-01 TDPS-760AB B
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Refurbished: R710 870W Server Power Supply N870P-SO A870P-00 07NVX8 0YFG1C
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Refurbished: KHACHIMO Power Supply 241120.400 241120.200
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Refurbished: 1pcs for 48v PWS-1K60D-1R server power supply
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Refurbished: For PS6100 PS4100 SC200 Storage power R0C2G 0R0C2G 0DD20N H700E-S0 ...
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Refurbished: 3850 Switch Power Supply PWR-C1-440WDC
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Refurbished: 1Pcs for R4850G6 48V50A Communication Power Module 3000W
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Refurbished: 1Pcs for NF5280M4 SA5212 PS-2801-6LS Server Power Supply 800W
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Refurbished: 1pcs for 3080 7080 7071MT Power supply H460EBM-00 L460EBM-00 ...
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Refurbished: DPS-1600CB B Server Power Supply 1600W
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Refurbished: RM4850H1 MR483000HG2A Communication Switching Power Supply Rectifier ...
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Refurbished: 5V2.5A 12V0.3A -5V0.5A Power Supply GZM-H20T5+12R-5R
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Refurbished: For H275AM-00 L275AM-00 F275EM-00 AC275AM-00 84J9Y B275
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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.