Intel Coffee Lake processors will be compatible with Skylake and Kaby Lake motherboards - HardwarEsfera
Physical Design, Integrated Graphics, and the Z370 Chipset: Differences - The AnandTech Coffee Lake Review: Initial Numbers on the Core i7-8700K and Core i5-8400
Die Sizes and DRAM Compatibility - The AnandTech Coffee Lake Review: Initial Numbers on the Core i7-8700K and Core i5-8400
Kaby Lake processors are incompatible with the Intel Z370 | KitGuru