AMD's X3D chips have long been some of the best for gaming because they stack tons of 3D V-Cache either on top of or underneath the processor, and games absolutely love all that cache.
We had the AMD Ryzen 7 9800X3D launch late last year, this being the current best CPU for gaming, and now, AMD's just announced two even more powerful versions.
The two new chips, the just-announced AMD Ryzen 9 9900X3D and Ryzen 9 9950X3D, should be available from Q1 this year. They don't come as a complete surprise, either—indeed, they were two of the main PC gaming components we were anticipating for 2025.
That's because the 7000-series also featured a Ryzen 9 7900X3D and Ryzen 9 7950X3D (although these actually launched before the Ryzen 7 7800X3D).
As with these 7000-series chips, AMD has now confirmed that the 9900X3D and 9950X3D will feature a split design where the 3D-stacked cache sits on top of just one of the two dies, meaning half of the processor's cores can benefit from the 3D cache but the other half can—at least in theory—benefit from higher clock speeds.