Users interested in Fan speed generally download:
SpeedFan is the popular utility meant for accurately monitoring the status of your computer’s hardware devices. Anyway, besides helping you keep a close eye on the parameters of your hardware components, this powerful and feature-rich program also lets you change your computer's fan speeds.
ACFanControl finds both fans for CPU and GPU and control the speed, temperature, etc. Through its interface you are able to see the ACFanControl logs (FanSpeedByte from EC and BiosControlByte from EC), read and display EC to EC1, set the FanControl from BIOS or manually, etc.
I8kfanGUI is a graphical Windows application to show the internal temperatures and to control the fan operation on the Dell Inspiron/Latitude/Precision notebook series. It's running under Windows 2000 and above operating system versions (Windows 2000/XP/Server2003/Vista)
Additional suggestions for Fan speed by our robot: