Intel Core i5 8400 's Advantages
Integrated graphics card
AMD Ryzen 7 2700 's Advantages
Released 6 months late
Higher specification of memory (DDR4-2933 vs DDR4-2666)
Larger memory bandwidth (43.71GB/s vs 41.6GB/s)
Higher base frequency (3.2GHz vs 2.8GHz)
Larger L3 cache size (16MB vs 9MB)