Hello, I drawed few schematics of 2 and 3 pin fans. http://www.pavouk.org/hw/fan/fan2.html They can be useful for you. Sorry for descriptions, that are not in English now. > Sorry for the lengthy explanation but the whole might be of interest for > other MB owners as well who try to control their CPU fan and don?t > succeed.... Best regards, Pavel Ruzicka