AMD Ryzen 5 3500X 's Advantages
Larger memory bandwidth (51.2GB/s vs 47.68GB/s)
Higher base frequency (3.6GHz vs 3.3GHz)
Lower TDP (65W vs 105W)
AMD Ryzen 9 5900XT 's Advantages
Released 4 years and 10 months late
Newer PCIe version (4.0 vs 4)
Larger L3 cache size (64MB vs 32MB)