RivaTuner Statistics Server (RTSS) is a software application designed to monitor and display real-time performance metrics for video games and other applications. It provides users with detailed information such as frame rates, CPU usage, and GPU temperatures, helping gamers optimize their performance and settings. RTSS is often used in conjunction with MSI Afterburner, a popular graphics card overclocking tool. Together, they allow users to customize on-screen displays and manage graphics settings effectively. RTSS supports various graphics APIs, making it versatile for different gaming environments.