ATX - BTX Motherboard Power - 24 Pin (ver. 2.x)

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24 pin connector at the power supply cable 24 pin power connector at the power supply cable

20+4 pin connector at the power supply cable 20+4 pin power connector at the power supply cable

24 pin MOLEX 44206-0007 connector at the motherboard 24 pin MOLEX 44206-0007 connector at the motherboard

ATX and BTX power connector on the motherboard consists of two rows of 12 pins. This connector from the ATX/BTX power supply can only be fitted in one way.

This ATX ver. 2.x standard supports 75 watt PCI Express requirements. Some motherboards allow to use an old ATX Motherboard Power - 20 Pin (ver. 1.x) with 20 pin connector that fits into 24 pin female connector. If you have an ATX power supply with a 24 pin main cable, it’s okay to plug it into a motherboard with a 20 pin connector.

Color Pin Name Description Color Pin Name Description
orange 1 +3.3 VDC Power +3.3V orange 13 +3.3 VDC Power +3.3V
orange 2 +3.3 VDC Power +3.3V blue 14 -12 VDC Power -12V
black 3 GND Ground black 15 GND Ground
red 4 +5 VDC Power +5V green 16 PS-ON Remote Power ON/OFF
black 5 GND Ground black 17 GND Ground
red 6 +5 VDC Power +5V black 18 GND Ground
black 7 GND Ground black 19 GND Ground
grey 8 PWROK Power Good 20
purple 9 +5 VSB +5V Standby red 21 +5 VDC Power +5V
yellow 10 +12 VDC Power +12V red 22 +5 VDC Power +5V
yellow 11 +12 VDC Power +12V red 23 +5 VDC Power +5V
orange 12 +3.3 VDC Power +3.3V black 24 GND Ground

Notes

  • /PSON activated by pressing and releasing the power button while the power supply is in standby mode.
  • Activating /PSON connects the power supply’s /PSON input to ground, thereby switching the power supply to full-on condition.
  • 18 AWG is recommended for all wires except pin 11, which should be 22 AWG.
  • For 300W configurations 16 AWG is recommended.

Connector part numbers

Motherboard connector: Molex 39-28-1243  
Cable connector: Molex 39-01-2240 
Terminals: Molex 39-00-0168, Molex 44476-1111  
Maximum current per circuit: 6 amps 

References

Category:Power Supply Connectors

 

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