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Power Supply for Dell KG1G0
$98 .75
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PFC Function Enclosed 315.9W 27V 11.7A SP-320-27 Meanwell AC-DC Single Output SP-320 ...
$173 .99
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APC PNOTEPROC6 SURGEARREST Notebook 120V Surge Suppressor NOTEBOOKPRO C6 ...
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Polycom INC. Universal Power Supply for CCX 500/600/700. 1-Pack, 48V, 0.52A, NA, and ...
$59 .99
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MEAN WELL EDR-120-12 Single Output DIN Rail Power Supply 12V 10 Amp 120W
$69 .99
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MyVolts 9V Power Supply Adaptor Replacement for Grundig Satellite 800 Radio - US Plug - ...
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TOPOWER TOP-800G 800W EPS12V/ATX12V v2.3 SLI Ready, CrossFire Ready, 80 PLUS ...
$139 .99
MEAN WELL NDR-120-24 Single Output Industrial DIN Rail Power Supply, 24 Volts 5 Amps 120 ...
$241 .99
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MEAN WELL MW GS90A24-P1M 24V 3.75A 90W AC-DC Green Industrial Adaptor
$83 .99
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XP POWER CLC175US12 AC-DC Conv, Open Frame, 1 O/P, 175W, 13.9A, 12V
$333 .99
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HKY AC Power Supply Compatible with MSI GE60 GE70 GL62 GP60 GP70 PE60 PE70 PX60 GE620 ...
$54 .99
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TP-Link TL-FC111B-20 | 10/100 Mbps WDM SFP to RJ45 Fiber Media Converter | Fiber to ...
$360 .99
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Power Supply Replacement for HP PSU 400w Platinum Rated Lincs Sunflower Pavilion ...
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HP 394982-001 450 Watt Power Supply For Proliant Dl320 G4
$159 .42
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CableMod C-Series Pro ModFlex Sleeved Cable Kit for Corsair RM Black Label/RMi/RMX ...
$180 .99
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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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New 110-230V 400W PSU 80Plus Bronze SFX Micro Full Module Professional E-Sports ...
$113 .99
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HP 240W Pro 6000 6005 6200 Elite 8000 8100 8200 SFF power supply 503375-001 ...
$54 .37
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Enclosed Type 156W 24V 6.5A RS-150-24 Meanwell AC-DC Single Output RS-150 Series MEAN ...
$81 .99
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CableMod C-Series Pro ModMesh Sleeved 8-pin PCI-e Cable for Corsair RM Yellow ...
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Siig Nn-400P33 Firewire 3-Port Pci Siig
$79 .25
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Enclosed Type 132W 3.3V 40A LRS-200-3.3 Meanwell AC-DC Single Output LRS-200 Series ...
$106 .99
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Streacom ST-NANO120 Nano PSU 120watt, AC-DC Adapter, Internal PSU
$209 .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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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.