A power supply unit (PSU) usually converts mains AC to low-voltage regulated DC power for the internal components. Most modern desktop personal computer power supplies conform to the ATX specification. Although there are a lot of other standard and proprietary power supply variants.

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  • 12 pin 2x MOLEX 15-48-0106
    AT motherboard power supply AT PSU's were used before ATX become to be standard.
  • 6 pin MiniFit Jr 5557-6 (MOLEX 39-30-1060) female
    ATX Optional power connector used on some ATX / NLX motheboards (rare)
  • 4 pin MiniFit Jr 5557-4 (molex 39-29-9042) female
    ATX / BTX +12V power connector used on modern ATX / BTX motherboards
  • 24 pin MiniFit Jr 5566-24 male (MOLEX 44206-0007)
    ATX 24 pin power supply connector ATX 2.2 and later (ATX12V 2) is common ATX standard, 24 pin connector.
  • 6 pin ATX AUX power
    ATX Aux power connector To be used on ATX / NLX motherboards requiring 250W or 300W. Also marked as P14 connector
  • 4 pin Mini-Molex (Berg plug)
    ATX PC floppy power connector Used for 3.5 floppies
  • 4 pin Molex power
    ATX PC peripheral power connector Used to power on PATA drives, CD-ROMs, add-on fans, extra video card power, supplemental motherboard power, case lighting.
  • 20 pin MiniFit Jr 5566-20 male (MOLEX 39-29-9202)
    ATX power supply connector v 1.x with 20 pin connector was widely used at PC motherboard. Replaced by v 2.x with 24 pin connector
  • 24 pin MiniFit Jr 5566-24 male (MOLEX 44206-0007)
    BTX motherboard power supply standard interface between BTX motherboard and compatible power supply
  • 15 pin Molex 67581-0000 SATA power
    Serial ATA (SATA) power connector 
  • 6 pin MiniFit Jr 5557-6 (MOLEX 39-30-1060) female
    SFX Optional Power 
  • 20 pin MiniFit Jr 5566-20 male (MOLEX 39-29-9202)
    SFX Power Supply Same as ATX except that -5VDC is removed from pin 18
  • 8 pin MiniFit Jr 5566-8 male
    WTX 12V CPU (P3) This connector provides 12V DC power to DC-DC convertors, Voltage regulator modules and so on
  • 6 pin MiniFit Jr 5566-6 (MOLEX 39-01-2060) male
    WTX 12V CPU (P4/P5) This connector provides 12V power to to Voltage regulator modules for processor and so on
  • 22 pin MOLEX 39-29-9222
    WTX Additional (P2) 
  • 24 pin MiniFit Jr 5566-24 male (MOLEX 44206-0007)
    WTX motherboard power supply Main (P1) pinout

Acer pinouts

AMD pinouts

  • 24 pin MiniFit Jr 5566-24 male (MOLEX 44206-0007)
    ATX GES 24 pin power supply connector Although most recent x86 server motherboards are designed to use either ATX12V v2.x or EPS12V power supplies, some servers use the ATX GES power supply standard developed by AMD to support its first server-class processor, the Athlon MP, when used in dual-processor (two-way) configurations.

Apple pinouts

Compaq pinouts

Dell pinouts

HP pinouts

IBM pinouts


 
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