This non-standard ATX wiring is used in Dell Pentium II and Pentium III systems. The connector on the power supplies used in Dell Socket 478 Pentium 4 systems is standard ATX-12V.
20 pin MOLEX 39-29-9202 connector at
the motherboard.
20 pin MOLEX 39-01-2200 connector at
the cable.
| Color | Signal | Pin | Pin | Signal | Color |
|---|---|---|---|---|---|
| grey | /PS_On | 11 | 1 | +5V | red |
| black | GND | 12 | 2 | GND | black |
| black | GND | 13 | 3 | +5V | red |
| black | GND | 14 | 4 | GND | black |
| white | -5V | 15 | 5 | Power_Good | orange |
| red | +5V | 16 | 6 | +5VSB (standby) | purple |
| red | +5V | 17 | 7 | +12V | yellow |
| red | +5V | 18 | 8 | -12V | blue |
| KEY (blank) | - | 19 | 9 | GND | black |
| red | +5V | 20 | 10 | GND | black |
Notes
- 18 AWG is recommended for all wires except pin 11, which should be 22 AWG.
- For 300W configurations 16 AWG is recommended.