SpeedFan is a freeware program that monitors fan speeds and temperatures in computers with a known monitoring chip.
Its main feature is that it can control the speed of the fans according to the temperatures inside your pc, thus reducing noise and power consumption.
What's New?
added support for nVidia video cards
added full logging capability
added detection for PC87591
added new S.M.A.R.T. attributes
fixed calling help with F1 key no longer working due to a bug in Delphi 7
trying to avoid LM84 misdetection
trying to avoid MAX6650 misdetection
trying to avoid AD7417 misdetection
avoid duplicate detection of S.M.A.R.T. drives
better detection of AD7417
added full support for NE1619
trying to add fan control for DELL sensors
initialized disabled LM79
added full support for MAX6648
added detection for DDC monitors
http://www.almico.com/speedfan.php