This non-standard ATX wiring is used in Dell Pentium II and Pentium III systems.
wire side view:
Color Signal Pin Pin Signal Color
Gray      /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
20 pin MiniFit Jr 5566-20 male (MOLEX 39-29-9202) connector layout
20 pin MiniFit Jr 5557-20 female (MOLEX 39-01-2200) connector layout
According to 44 reports in our database (41 positive and 2 negative) this pinout should be correct.

Is this pinout
Source(s) of this and additional information: DELL ATX design, http://pinouts.ru/Power/atxpower_pinout.shtml
This page contain parts under Copyright © 2000-2015 by pinouts.ru team.
No portion of this webpage may be reproduced in any form without providing visible HTML link to Pinouts.ru . Webmaster permission required in any other cases.
Efforts have been made to ensure this page is correct, but it is the responsibility of the user to verify the data is correct for their application.