Intel Core i7 9800X 's Advantages
Larger L3 cache size (17MB vs 16MB)
AMD Ryzen 5 8400F 's Advantages
Released 5 years and 6 months late
Higher specification of memory (DDR5-5200 vs DDR4-2666)
Larger memory bandwidth (83.2GB/s vs 79.47GB/s)
Newer PCIe version (4 vs 3.0)
Higher base frequency (4.2GHz vs 3.8GHz)
Lower TDP (65W vs 165W)