SpeedFan may be able to reduce fan noise:
SpeedFan is a program that monitors
voltages, fan speeds and temperatures
in computers with hardware monitor
chips. SpeedFan can even access
S.M.A.R.T. info and show hard disk
temperatures. SpeedFan supports SCSI
disks too. SpeedFan can even change
the FSB on some hardware (but this
should be considered a bonus feature).
SpeedFan can access digital
temperature sensors and can change fan
speeds accordingly, thus reducing noise. SpeedFan can find almost any
hardware monitor chip connected to the
2-wire SMBus (System Management Bus
(trademark belonging to SMIF, Inc.), a
subset of the I2C protocol) and works
fine with Windows 9x, ME, NT, 2000,
2003, XP and Windows Vista. It works
with Windows 64 bit too.
