Motherboard Monitor is a tool that will display information from the sensor chip on your motherboard in your Windows system tray. MBM supports a wide range of Chipsets & Sensor Chip combinations. MBM is compatible with Windows 95, 98, ME, NT, 2000, XP and .NET
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).
Download and few screenshots over here