Intel Core i5 6400 's Advantages
Integrated graphics card
AMD Ryzen 7 3700X 's Advantages
Released 3 years and 10 months late
Higher specification of memory (3200 vs 2133)
Larger memory bandwidth (47.68GB/s vs 34.1GB/s)
Newer PCIe version (4.0 vs 3.0)
Higher base frequency (3.6GHz vs 2.7GHz)
Larger L3 cache size (32MB vs 6MB)
More modern manufacturing process (7nm vs 14nm)