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AT motherboard power supply pinout

connector or cable wiring scheme

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AT PSU´s were used before ATX become to be standard.

12 pin 2x MOLEX 15-48-0106 connector layout

12 pin 2x MOLEX 15-48-0106 connector
at the computer



AT power supply delivers +5 V, +12 V, -5 V and -12 V voltages using two six-pin connectors. Note, that you must install these connectors to the motherboard in a way that the black wires are placed on the center, or your equipment will be damaged.

P8 AT power supply connector

Pin Name Color Description
1PGOrangePower Good, +5 VDC when all voltages has stabilized.
2+5VRed+5 VDC (or n/c)
3+12VYellow+12 VDC
4-12VBlue-12 VDC
5GNDBlackGround
6GNDBlackGround

P9 AT power supply connector

Pin Name Color Description
1GNDBlackGround
2GNDBlackGround
3-5VWhite or Yellow-5 VDC
4+5VRed+5 VDC
5+5VRed+5 VDC
6+5VRed+5 VDC

Note: Pins part number is 08-50-0276, Product specification is PS-90331.

6 pin 2x MOLEX 90331-0001 connector diagram

6 pin 2x MOLEX 90331-0001 connector
at the Powersupply cables

Pinouts.ru > ATX, BTX, WTX and other power supply cables connectors pinouts listing >  Pinout of AT motherboard power supply and layout of 12 pin 2x MOLEX 15-48-0106 connector and 6 pin 2x MOLEX 90331-0001 connector
Document status: correct
Source(s) of this and additional information: Hardware Book, Bill Shepherd 6 reports
Last updated at Mon May 29 2006. Submit additions or corrections for this document. Is this document correct or incorrect? What is your opinion?
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