AMD Ryzen 5 2600 's Advantages
Higher base frequency (3.4GHz vs 3.0GHz)
AMD Ryzen 9 5900 's Advantages
Released 2 years and 4 months late
Higher specification of memory (DDR4-3200 vs DDR4-2933)
Larger memory bandwidth (51.2GB/s vs 43.71GB/s)
Newer PCIe version (4.0 vs 3.0)
Larger L3 cache size (32MB vs 16MB)
More modern manufacturing process (7nm vs 12nm)