Intel Core i7 6800K 's Advantages
Higher base frequency (3.4GHz vs 3.0GHz)
Lower TDP (140W vs 250W)
AMD Ryzen Threadripper 2990WX 's Advantages
Released 2 years and 3 months late
Higher specification of memory (2933 vs 2133)
Larger memory bandwidth (87.42GB/s vs 76.8GB/s)
Larger L3 cache size (64MB vs 15MB)
More modern manufacturing process (12nm vs 14nm)