I notice the time lapse between your original past and now. There do not appear to be any answers posted. If there are please advise where I can find them.
You see, I have also noticed the fan speed modulating in my Scaleo P. It always ran fast when the machine started up but would throttle back to a near silent rotation when fully booted, where it remained virtually silent.
However, after nearly 4 yrs, I had to re-build my broken Windows system from scratch. The "recovery" discs that came with the machine turned out to be for Windows XP Pro and not the original loaded at factory XP Home edition, but I used them anyway and since then my fan speed has modulated with the system load.
Now I had noticed that the CPU core temperature and two fan speeds are recorded in the BIOS. Could it be that there is a facility, whether implemented or not, that can regulate the cooling in sympathy with the CPU core temperature? Further to that is this so called idea of "over-clocking" the CPU to make it run faster. Could that have a further bearing on the core temperature? Does XP Pro do that in its implementation?
I would be very interested to know if anyone out there can throw some more light on this issue.