A leaked slide from a purported ASRock Intel 400 series presentation indicates that the company's Base Frequency Boost (BFB) technology enables overclocking on non-K Intel CPUs and non-Z motherboards.
https://www.notebookcheck.net/ASRock-s-leaked-Base-Frequency-Boost-hacks-Intel-overclocking-limits-enabling-non-K-CPU-and-non-Z-mobo-overclocking-will-the-i3-10100-trounce-the-Ryzen-3-3100X.463358.0.html