SpeedFan helps you stay on top of your system's vital statistics, including temperature, fan speed, and others, to ensure that things are running smoothly. Aside from basic monitoring, this program enables users to troubleshoot issues and make adjustments to various systems.
Clear interface: This app's interface is nicely organized into sections that you can move through using the tabs across the top of the screen. Options here include Readings, which features stats about CPU Usage, Fans, Temperatures, and more, Clocks, which lets you reset your Motherboard clocks, and SMART Data.
Charts section: There is also a section that lets you create charts to visualize data recorded about various aspects of your computer. You can choose to see readouts of Temperatures, Fan Speeds, and Voltages to get a better idea of the way these values are trending over time so you can quickly identify when something is going wrong.
Not for beginners: Most of the information this program presents will have little meaning to inexperienced users. There are good warnings about taking actions that could potentially harm your computer if you don't know what you're doing, so you're not likely to do any harm. But it won't do you much good either.
SpeedFan is a nice, free utility to help you monitor various aspects of your system. It presents all data clearly, and you can find what you're looking for quickly, thanks to the conveniently tabbed interface. It's not much use if you don't have some significant knowledge about your computer's inner workings. But for power users, it's a good tool.
SpeedFan monitors voltages, fan speeds, and temperatures in computers with hardware monitor chips. It can even access SMART information for hard disks that support this feature, and show hard-disk temperatures if that are supported. SpeedFan fully supports SCSI disks and can even change the FSB on some hardware (but this should be considered a bonus feature). At the lowest level, SpeedFan is a hardware monitor software that can access temperature sensors, but mainly it can control fan speeds (depending on the capabilities of your sensor chip and your hardware) according to the temperatures inside your PC, thus reducing noise and power consumption.