[Wolves] Andy or other hardware fans

[Andrew Lewis]

David Morley wrote:

>What are the three leads on a cpu fan for?  Reason is, I needed a new
>fan for my ipcop machine but I couldn't find the exact heatsink/fan I
>needed.  The current one is connected to a standard 4 pin power
>connector and has two leads red and black coming off it, the new fan
>has three leads red yellow and black can I connect it up to the
>original 2 leads coming off the 4pin adapter or not?  Is the yellow
>lead relevant?
>  
>
the third wire is a sensor, it's how the motherboard knows what speed 
the fan is rotating at.

spline