We have just built an i5-8600k based system for a customer and I can tell you they are a fast CPU. When running Cinebench R15 to test the cpu performance against other models the new 8th Gen i5 cpu beat the 7th gen I7 7700k. There scores were 1019 for the 8th gen and 976 for the 7th gen. I think this is because the 8th gen cpu has 6 cores and no hyper threading over the 7th gen which is 4 core with hyper threading and more real cores is better. Here’s a screen grab. I’m really looking forward to building more of these systems in the future.