Core Temp is a compact, no fuss, small footprint, yet powerful program to monitor processor temperature and other vital information
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).
Motherboard Monitor (MBM) is a tool that will display information from the sensor chips on your motherboard in your Windows system tray. MBM supports a wide range of Chipsets & Sensor Chip combinations.
It can sense temps from Cpu, HDD, GFx and Mobo. It does also sense Fan speeds. If it senses that your hardware is overheated it can protect it by Shutting it down (user configured). To see if MBM5 supports your hardware check out the Motherboard List