Core i5-8600K has performance similar to Core i7-7700K | TweakTown
Compare Intel Coffee Lake Core i5 8600K Vs AMD Ryzen 5 1600X Specs
Intel Core i5-8600K vs Ryzen 5 1600 vs Ryzen 7 1700 vs. i5-7600K - Logical Increments Blog
Core i5-2500K vs Core i5-3570K vs Core i5-6600K vs Core i5-4670K vs Core i5-7600K vs Core i5-8600K vs Core i5-9600K vs Core i5-10600K DiRT Rally Benchmarks - CPUAgent
Intel Core I5-8600K Vs Core I7-8700K - Which One Is Better?