CPU PWM fan on a Dell Optiplex

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blix83 Posted messages 203 Registration date   Status Membre Last intervention   -  
blix83 Posted messages 203 Registration date   Status Membre Last intervention   -
Hello everyone :)

I would like to know which wire corresponds to the CPU fan connection on a Dell Optiplex 780 (tower) to a PWM adapter. Could someone inform me about this subject?

One wire gives me doubt :/

https://i.ebayimg.com/00/s/NjY1WDYxMA==/z/T00AAOxyK~hRHe7D/$T2eC16VHJHgE9n0yFjOGBRHe7C1i)Q~~60_57.JPG

Here is the Dell fan from which I retrieved the wires with the connector. (dead fan)
4 wires, yellow, red, black, and blue.

http://media.ldlc.com/ld3/300/2009/LD0000739914.jpg

And the PWM adapter that I cannot connect to my motherboard.
4 wires as well, but not the same colors, black, yellow, blue, and green.

Which wire connects to which????

Thank you :)

Configuration: Windows 7 / Chrome 39.0.2171.71

1 réponse

blix83 Posted messages 203 Registration date   Status Membre Last intervention   27
 
Being stubborn helps, after more than 15 days of searching everywhere, I finally found it :)

This photo helped me:

With this one too:

We can see that black remains black
that the red coming from the Dell motherboard is the 12V, which will connect to the yellow
the blue remains blue
and the yellow coming from the Dell motherboard becomes green.

Summary:

Dell \ / PWM
\ /
black = black
red = yellow
yellow = green
blue = blue

For those who are interested and might help ;)

My PC didn’t catch fire, no power cut, the CPU fan is running properly.
It seems to be working.
20
blix83 Posted messages 203 Registration date   Status Membre Last intervention   27
 
There are also adapters available for those who don't want to bother and prefer to do things neatly. :)

https://www.frozencpu.com/products/8469/cab-152/FrozenCPUcom_4-Pin_PWM_to_5-Pin_Dell_Adapter_Cable_-_8_Length_CB-PWM-D5.html
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