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. Currently the only recognized (and useful) chips are WINBOND W83782D, which is found in ABIT BP6, and WINBOND W83627HF. SpeedFan monitors temperatures and, according to your setup, does its best to keep them at your desired value. When choosing parameters for the minimum and maximum fan speed, try to set them by hand (disable all the VARIATE FANs checkboxes) and listen to the noise. When you hear no noise from the fan then you can set that value as the minimum fan speed for that fan SpeedFan can be minized to the tray and is compatible with Motherboard Monitor 5.
News source: Tweak Files
Download: Speed fan Beta
This is BETA software!, please use caution when installing it on your system