Priest of the Order of the Butterfly
Posts: 676 from 2003/3/4
From: #AmigaZeux, Gu...
You could power the fan from an alternative source, such as a molex. That would mean it would run 100%. If you wanted to slow it down somewhat, there are fan controllers, both manual and thermostat controlled.
But as to adjusting it in the BIOS, it's probably hard-coded. Apple don't like people playing around with things.