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Another fan question

Last response: in Components
November 4, 2012 6:08:14 PM

Hello all, I have two fans that uses the 3 pin connector but they only have two cables, the black and red cables, the third pin is empty, when I plug those fans to my mobo fan headers, they spin just find, but the mobo does not detect them in the bios, is that because they only have two pins? shouldnt the mobo at least know that there is a fan there in general even if the fan is only using 2 pins?

Asus Maximus V Gene
thermal take 60mm fans

More about : fan question

a b ) Power supply
November 4, 2012 6:21:26 PM

3rd pin is the "sense" pin. The other two are just power.