Intel Core i5 6600 's Advantages
Integrated graphics card
Higher base frequency (3.3GHz vs 3.0GHz)
Lower TDP (65W vs 250W)
AMD Ryzen Threadripper 2990WX 's Advantages
Released 2 years and 11 months late
Higher specification of memory (2933 vs 2133)
Larger memory bandwidth (87.42GB/s vs 34.1GB/s)
Larger L3 cache size (64MB vs 6MB)
More modern manufacturing process (12nm vs 14nm)