i5 7600k OC @5,04GHz (BCLK 105, multi 48x, voltage 1,38). Temps in check with a corsair AIO 240mm cooler. Nice single core score for a 4 years old cpu. : r/overclocking
Power and Overclocking - The Intel Core i5-7600K (91W) Review: The More Amenable Mainstream Performer
How to Overclock Your CPU: Intel and AMD steps for beginners | Trusted Reviews