SetFSB is a software tool designed to increase the clock speed of the CPU and other components of a computer. It allows users to access and modify the frequency settings of the system's front-side bus (FSB) and other system components. The software can also monitor system temperatures and display them in real-time, helping users to prevent overheating issues. Additionally, SetFSB provides users with the ability to save and load custom profiles for quick and easy system overclocking.