Intel Core i5 8600 's Advantages
Integrated graphics card
Higher base frequency (3.1GHz vs 2.9GHz)
Lower TDP (65W vs 280W)
AMD Ryzen Threadripper 3990X 's Advantages
Released 1 years and 9 months late
Higher specification of memory (DDR4-3200 vs DDR4-2666)
Larger memory bandwidth (95.37GB/s vs 41.6GB/s)
Newer PCIe version (4.0 vs 3.0)
Larger L3 cache size (128MB vs 9MB)