The AMD Ryzen 9 9950X and Ryzen 9 9900X are part of different generations. The Ryzen 9 9900X was released on January 29, 2019, as part of the 2000 series. In contrast, the Ryzen 9 9950X, which is part of the Ryzen 7000 series, was announced on August 29, 2022. If you need more details about their specifications or performance comparisons, feel free to ask!