Motherboard connectors  > Dell pinouts
Fan for CPU or HD
1 Sense

yellow or white // from fan

2 12 V red // fix voltage
3 GND black
4 Speed blue or green // from mainboard
5 NC  unused

Measurements with CPU heat of 40°C:

Sense puls: ca. 27 Hz ( duty cycle 50:50), 3.3 V

Speed puls: ca. 2 usec and 43 usec pause, 3.3 V; probably a pwm puls

The fans that connect to the header are: Model AFC1212DE , DELL PIN: MJ989.


5 pin IDC male connector layout
5 pin IDC male connector
at the mainboard left down
According to 17 reports in our database (17 positive and 0 negative) this pinout should be correct.

Is this pinout
DELL Dimension 9200 Fan visual pinout:
DELL Dimension 9200 Fan diagram
click to enlarge
Source(s) of this and additional information: , My Dell Fan
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