AMD Ryzen 9 7900X 's Advantages
Higher base frequency (4.7GHz vs 4.3GHz)
AMD Ryzen 9 9950X3D 's Advantages
Released 2 years late
Higher specification of memory (5600 vs 5200)
Larger memory bandwidth (89.6GB/s vs 83.2GB/s)
Larger L3 cache size (128MB vs 64MB)
More modern manufacturing process (4nm vs 5nm)