I've just finished an article in "Making a Rheobus Controller"
I believe the information may be useful to you members and I would like to
share it with them.
"The adding of fans into a computer system will definitely increase the
noise level in the system. The amount of heat that is generated depends very
much on the loading in the system. Therefore to enable ourselves to use the
overclocked computer system comfortably and still run stably, we need to
have a devise to control the speed of the fan to reduce the noise level
according to the loading in the system. This can be done by using a Rheobus
where the control knobs are fixed onto the 5 1/4" bay of the computer."
Direct Link http://www.ocmod.com/code/show_art.php?id=29&pg=1