Intel Core i7 6900K 's Advantages
Larger memory bandwidth (76.8GB/s vs 51.2GB/s)
AMD Ryzen 7 5800 's Advantages
Released 4 years and 8 months late
Higher specification of memory (DDR4-3200 vs DDR4-2133)
Newer PCIe version (4.0 vs 3.0)
Higher base frequency (3.4GHz vs 3.2GHz)
Larger L3 cache size (32MB vs 20MB)
Lower TDP (65W vs 140W)