I have a 3 pin CPU fan from a Dimension 8200 which I would like to put into my Dimension 8400.

I have a 3 pin to 4 pin molex but would like to still use the fan header on the motherboard, the 3 pin CPU fan from the 8200 is red,black and white and the 4 pin CPU fan from the 8400 is red,black, blue and white.

I am thinking of cutting the 4 pin plug off the 8400 fan and fixing it to the 8200 fan which will mean I will have a redundant pin header on the board which is what the blue wire is for, my guess is fan control??

This page from Intel http://www.intel.com/support/motherboards/desktop/sb/CS012074.htm suggests that going from 4 to 3 pin will make the fan spin at one speed only. Can some one please give me some advice? this 8200 Fan is proberly not as but is very quiet, the CPU the fan will be going on is a 3.6Ghz #660 CPU

 

Thanks all