> As long as the > current draw > of the +5V circuitry exceeds the fan current plus the power > supply minimum > required output current, it should work. Note that most (older?) SPSU's assumed a minimum load (1A or so) on the 5 Volt, so it is likely that a motherboard draws (significantly) more than that minimum. > However, I still think it's a bad idea. Can't argue with that. It is operating something outside its specifications, much like overclocking a PIC, using the protection diodes to conduct current, relying on an RS-232 port to work on 0..5 Volt, etc etc. And we never do anything like that, do we ;) Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body