Power Supplies - Showing 2209 - 2232 of 17940 Products

Filter (0)
Refurbished: 1Pcs for CFB09-044A S26113-E569-V70-01 R920R930 Medical Workstation ...
$791 .00
Free Shipping
Refurbished: KHACHIMO AIO OptiPlex 3250 5250 7450 18Pin 155W Power Supply ...
$119 .00
Free Shipping
Refurbished: ACE300F 300W AC3-TCCB-00 AC3-OHRM-00 AC3-FWCB-00 AC3-OHWM-00 ...
$389 .00
Free Shipping
Refurbished: 48V4000W 48V75A AC-DC power supply ZXD4000 V5.0
$249 .00
Free Shipping
Refurbished: X335 Server Power API1FS29 331W 49P2012 49P2013
$139 .00
Free Shipping
Refurbished: For Motorola Power Module AA25920L
$539 .00
Free Shipping
Refurbished: KHACHIMO 5V12V24V48V Power Supply WM-WAWAX6
$79 .00
Free Shipping
Refurbished: 1PCS for T3600 T5610 T7600 F685EF-00 D685EF-00 685W Power Supply ...
$176 .00
Free Shipping
Refurbished: 1PCS for SFXA4251A 250W SFX IPC Power Supply
$79 .00
Free Shipping
Refurbished: S9300 2200W Switching Power Supply W0PSA2200 EPW40-48A-1
$1,199 .00
Free Shipping
$1,199 .00
Sold by: Magicpower
Refurbished: 1PCS for MD3000 AMP01-RSIM P2GW4 WR862 CM670 X2R63
$338 .00
Free Shipping
Refurbished: 1PCS for TPS580-12D DC Server Module, Power Supply
$103 .00
Free Shipping
Refurbished: 1PCS For V5000 V3700 00Y2527 00L4598 R0793-F0200-01
$239 .00
Free Shipping
Refurbished: For RM-7503-00 YM-3531 YH-5681H YM-2681H
$339 .00
Free Shipping
Refurbished: For TDK-LAMBDA 32V 1000W Power Supply FPS1000-32
$1,199 .00
Free Shipping
$1,199 .00
Sold by: Magicpower
Refurbished: 4028GR PWS-2K03P-1R 2000W CPR-2021-2M1
$429 .00
Free Shipping
Refurbished: 1PCS for R510 12V60A 750W D750P-SO Server Power Supply
$79 .00
Free Shipping
Refurbished: KHACHIMO Vostro 270s 660s 220W Power Supply DPS-220UB A DPS-220UB-5A ...
$59 .00
Free Shipping
Refurbished: 1PCS for 031MPJ 032PYM STL2BATTA01/03 S5300/5500/5500F V3V5
$647 .00
Free Shipping
Refurbished: KHACHIMO S510 S560 S590 S710 S720 S770 M7121 M7100Z M7101Z 14Pin ...
$69 .00
Free Shipping
Refurbished: 1pcs for FSP350-50GMN ST-400P-AD ST-550UAC-05G FSP220-20FGBBD ...
$254 .00
Free Shipping
Refurbished: KHACHIMO AC220V 280W Switching Power Supply AT350-24V-48B
$89 .00
Free Shipping
Refurbished: For CPB09-043A 800W R920 M720 Medical Power Supply S26113-E568-V70
$220 .00
Free Shipping
Refurbished: Server Hot Swap Redundant Power Supply 500W M1P-2500V
$279 .00
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.