SpeedFan
4.2.8 SpeedFan is a freeware program
that monitors voltages, fan speeds and temperatures
in computers with hardware monitor chips.
SpeedFan can even access S.M.A.R.T. info for
those hard disks that support this feature
and show hard disk temperatures too, if supported.
SpeedFan supports SCSI disks too. SpeedFan
can even change the FSB on some hardware (but
this should be considered a bonus feature).