CPU-Z is a free software tool that provides detailed information about a computer's hardware components. It displays data about the CPU, motherboard, RAM, and other system specifications, helping users understand their system's capabilities. The program is user-friendly and does not require installation, making it accessible for anyone looking to gather information about their computer. CPU-Z is widely used by gamers, overclockers, and tech enthusiasts to monitor system performance and ensure compatibility with software and hardware upgrades.