Intel Core i7 9800X 's Advantages
Larger memory bandwidth (79.47GB/s vs 47.68GB/s)
Higher base frequency (3.8GHz vs 3.4GHz)
AMD Ryzen 7 5800X3D 's Advantages
Released 3 years and 5 months late
Higher specification of memory (DDR4-3200 vs DDR4-2666)
Newer PCIe version (4.0 vs 3.0)
Larger L3 cache size (96MB vs 17MB)
Lower TDP (105W vs 165W)