Ryzen 9 is a high-performance processor series developed by AMD designed for enthusiasts and professionals. It features multiple cores and threads, allowing for efficient multitasking and improved performance in demanding applications like gaming, video editing, and 3D rendering. The Ryzen 9 series includes models such as the Ryzen 9 5900X and Ryzen 9 5950X, which offer advanced technologies like PCIe 4.0 support and high clock speeds. These processors are compatible with the AM4 socket and are often paired with high-end motherboards to maximize their capabilities.