Power Supplies - Showing 1321 - 1344 of 11998 Products

Filter (0)
Aruba X382 54VDC 2700W AC Power Supply JL372AB2E
$2,037 .00
Free Shipping
$2,037 .00
Sold by: Digitzy
CableMod C-Series Pro ModMesh Sleeved 8-pin PCI-e Cable for Corsair RM Black ...
$180 .99
Free Shipping
$180 .99
Sold by: Nature
MW Mean Well EPS-65S-12 12V 5.42A 65W Single Output Switching Power Supply
$66 .99
Free Shipping
$66 .99
Sold by: Nature
Power Supply for Dell KG1G0
$98 .75
Free Shipping
WatchGuard Power Supply T35-Rugged (EU)
$106 .99
Free Shipping
$106 .99
Sold by: Nature
Dell M0148 Dell 250 Watt Power Supply For Dimension 2400 3000-M0148
$45 .00
Free Shipping
Mean Well Original RSP-500-5 Single Output with PFC Function Power Supply 5V 90A 450W
$230 .99
Free Shipping
$230 .99
Sold by: Nature
Enclosed Type 150W 12V 12.5A RS-150-12 Meanwell AC-DC Single Output RS-150 Series ...
$74 .99
Free Shipping
$74 .99
Sold by: Nature
Whatsminer P21D Miner Power Supply, AC 200V-277V PSU for Whatsminer M10s, M20s, M21s ...
$630 .99
Free Shipping
$630 .99
Sold by: Nature
Raidmax Hybrid 730W ATX12V/ EPS12V Power Supply RX-730SS
$108 .99
Free Shipping
$108 .99
Sold by: Nature
TOPOWER TOP-600D 600W EPS12V / ATX12V SLI Ready CrossFire Ready 80 PLUS BRONZE ...
$64 .99
Free Shipping
PSU for 3020 7020 9020 255W Power Supply L255AS-00 AC255ES-00/01 HU255AS-00 ...
$125 .99
Free Shipping
$125 .99
Sold by: Nature
ePOWER EP-550-TD1 550 W ATX12V Active PFC Power Supply
$49 .99
XPG CORE Reactor 650Watt 80 Plus Gold Certified Fully Modular Power Supply ...
$180 .99
Free Shipping
$180 .99
Sold by: Nature
Vbestlife PC Power Supply, 600W Desktop Computer Parts, Computer Power, Adjustable ATX ...
$118 .99
Free Shipping
$118 .99
Sold by: Nature
CableMod E-Series Pro ModFlex Sleeved 8-pin PCI-e Cable for EVGA G5 / G3 / G2 / P2 / T2 (Black, ...
$180 .99
Free Shipping
$180 .99
Sold by: Nature
Dell R8038 Dell 220 Watt Power Supply For Optiplex Gx520 Sff
$51 .80
Free Shipping
Seasonic SS-350SFE 350W Active PFC Power Supply
$171 .99
Free Shipping
$171 .99
Sold by: Nature
MW Mean Well WDR-120-12 12V 10A 120W Single Output Industrial DIN RAIL Power Supply
$174 .99
Free Shipping
$174 .99
Sold by: Nature
JPS300P-A5.0V G-Energy Best Price 5V 60A 300W Power Supply G-Energy JPS300P-A5.0V
$135 .99
Free Shipping
$135 .99
Sold by: Nature
Seasonic SSP-300TGS 300W 80 Plus Gold TFX 12 V v. 2.31 Power Supply w/Active PFC
$161 .99
Free Shipping
$161 .99
Sold by: Nature
Dell Optiplex 390 790 990 3010 7010 9010 SFF Computer Power Supply 240 Watt CCCVC ...
$58 .20
Free Shipping
127999-001 Compaq Power Supply - 145 Watt Atx Presario Replaces Pn 12
$59 .90
Free Shipping

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.