It has been known for some time that Intel’s 7th generation Core processor family (Kaby Lake) would not work in Z370 chipset motherboards designed for 8th generation Core processors (Coffee Lake) even though both use the same LGA 1151 socket. The assumption has been that the power requirements for Coffee Lake prevent Z370 motherboards from

Source: Hot Hardware – Intel’s Z370 Coffee Lake Chipset Blocks Kaby Lake Processors In Firmware