8400は結構凄いよね
Intel Core i7-8700K, i5-8600K, 8400 versus AMD Ryzen 7 1800X, R5 1600X, 1500X
https://www.techspot.com/review/1505-intel-core-8th-gen-vs-amd-ryzen/

Intel Core i7 8700K Ubuntu Linux Benchmarks
http://openbenchmarking.org/result/1710047-TY-KAFFEE87095