20 pin MiniFit Jr 5566-20 male (MOLEX 39-29-9202) connector layout
20 pin MiniFit Jr 5566-20 male (MOLEX 39-29-9202) connector
at the motherboard
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
18 AWG is recommended for all wires except pin 11, which should be 22 AWG. For 300W configurations 16 AWG is recommended.
 
The connector on the power supplies used in Dell Socket 478 Pentium 4 systems (and other modern Dell computers ?) is standard ATX-12v.
 
Note: some Dell power supplies do not have the -5 (white wire), (2002 v1.2 made optional, 2004 v2.01 removed from specification)
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Pinouts.ru > ATX, WTX and other standard and proprietary power supply (PSU) cables connectors > Pinout of DELL ATX motherboard Power Supply and layout of 20 pin MOLEX 39-29-9202 connector and 20 pin MOLEX 39-01-2200 connector
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