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Refurbished: For FSP400-60WSA-5K FSP600-50UEB FSP400-602UE Power Supply
$323 .00
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Refurbished: For FSP060-1AD101C KPL-060F FSP048-RHAN2 FSP030-RHAN2 Power Supply
$118 .00
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Refurbished: W2PSD2200 S12704 S12700E-4 Series Switch DC Power Module 02270117
$339 .00
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Refurbished: KHACHIMO 80plus Gold 1U 500W Switching Power Supply DPS-500YB B ...
$249 .00
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Refurbished: 400 600 690 800 G1 G2 6Pin 240W Power Supply D12-240P3A PS-4241-2HF1 ...
$49 .00
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Refurbished: MSL5030 MSL5026 Tape Library Power Supply RAS-2662P
$209 .00
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Refurbished: 1PCS for 750W server power supply PS-2751-1F-LF PS-2751-2F-LF
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Refurbished: For 14 pin 280W power supply H530 M8400T TS230 ...
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Refurbished: For Server Power Supply for FSP FSP650-80GLC 650W
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Refurbished: 400W Power Supply PWS-406P-1R CPR-4011-4M1
$299 .00
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Refurbished: For Traco Power TXL035-12S Module
$119 .00
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Refurbished: For CX3-80 Management Module 100-561-334 100-561-085 NS80
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Refurbished: For FSP700-50AUE FSP750-50ABA FSP600-50AUE FSP500-50AUE Power ...
$368 .00
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Refurbished: For SWS600L-24 DC Power Supply 600W 24V Output
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Refurbished: For R2W-5600P-R Server Power Supply
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Refurbished: KHACHIMO computer 400W industrial power supply ACE-A140A
$439 .00
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Refurbished: KHACHIMO GTX1050TI 1060 Rated 400W Peak 500W Switching Power Supply ...
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Refurbished: 1pcs for MER048-50A 48V50A
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Refurbished: CSU520Y Communication Power Monitoring Module
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Refurbished: KHACHIMO DL160G6 DL165G6 500W Power Supply HSTNS-PF01 506077-001 ...
$179 .00
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Refurbished: PS-5221-09/6/8 PE-5221-08 220WITX Small Case
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Refurbished: PSU For 3Y 1100W Power Supply YM-2112E
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Refurbished: KHACHIMO Switching Power Supply For ZXDT02 SC50 ZXDT02 ...
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$1,399 .00
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Refurbished: 1Pcs for R620 R720 R820 Server Power Supply 1100W L1100E-S0 0NTCWP ...
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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.