Power Supplies - Showing 1225 - 1248 of 18757 Products

Filter (0)
[PowerNex] Mean Well QP-320D 5V +/-12V 24V 2A 3A 10A 20A 316W Quad Output with PFC ...
$364 .99
Free Shipping
$364 .99
Sold by: Nature
MW Mean Well LPP-150-48 48V 3.2A 152W Single Output with PFC Function Power Supply
$122 .99
Free Shipping
$122 .99
Sold by: Nature
IBM System x3550 Type 7978 670W Red PSU Part # 39Y7189
$63 .99
Free Shipping
$63 .99
Sold by: Nature
E-POWER EP-450P5-L1 Power Supplies
$39 .99
Free Shipping
MEAN WELL HRP-450-15 AC/DC Power Supply Single-Out 15V 30A 450W 13-Pin
$257 .99
Free Shipping
$257 .99
Sold by: Nature
HP 540W AC Power Supply
$100 .88
Free Shipping
PSU for M800z M900z M8350z Power Supply HKF1501-3B PA-1151-1 APE004
$120 .99
Free Shipping
$120 .99
Sold by: Nature
TOPOWER 1800W GPU Mining Power Supply For BTC/BCH/ETC/ETH/LTC/ XMR/XRP/ZEC etc, ...
$159 .79
Free Shipping
$159 .79
Sold by: Coretix
Power Supply 12/24Dc @ 4A
$223 .99
Free Shipping
$223 .99
Sold by: Nature
APC Rack Mount PDU, Basic 100V-120V/15A, (14) Outlets, 0U Vertical Rackmount (AP9567)
$335 .99
Free Shipping
$335 .99
Sold by: Nature
CableMod C-Series Pro ModMesh Sleeved 8-pin PCI-e Cable for Corsair RM Yellow ...
$180 .99
Free Shipping
$180 .99
Sold by: Nature
LED Driver 30W 15V 2A ELN-30-15 Meanwell AC-DC SMPS ELN-30 Series MEAN WELL C.V+C.C ...
$76 .99
Free Shipping
$76 .99
Sold by: Nature
Zeus GAMDIAS RGB Gaming PC Power Supply 750W 80 Plus Gold Certified 750 Watt PSU for ...
$180 .99
Free Shipping
$180 .99
Sold by: Nature
Enclosed Type 102W 12V 8.5A SE-100-12 Meanwell AC-DC SMPS SE-100 Series MEAN WELL ...
$86 .99
Free Shipping
$86 .99
Sold by: Nature
HP 230993-001
$367 .68
Free Shipping
HitLights 24 Watt (2 Amp) LED Power Supply 110V AC to 12V DC Transformer UL-Listed Lighting ...
$50 .99
Free Shipping
$50 .99
Sold by: Nature
SilverStone Technology ST1500-TI, 80 Plus Titanium 1500W Fully Modular ATX/PS2 Power ...
$900 .99
Free Shipping
$900 .99
Sold by: Nature
REVO America R12VPWR1TO4 4 Channel 12V Power Supply (Black)
$50 .99
Free Shipping
$50 .99
Sold by: Nature
Power Supply (Delta Dtps-200Pb-109A) - 115-230Vac Input 45-66Hz
$82 .01
Free Shipping
Mean Well Es18U05 Ac Adapter 5V 3.00A 15W
$90 .31
Free Shipping
Dell Pw114 Dell 305 Watt Power Supply For Optiplex 760 960 Mt
$58 .20
Free Shipping
Switching Power Supplies 5V7A 15V2.5A -5V0.5A -15V0.5A 82.5W
$71 .99
Free Shipping
$71 .99
Sold by: Nature

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.