The SiSoft Sandra benchmarks reveal that the upcoming Coffee Lake-S octa-core/16-thread CPUs will be compatible with current chipsets and the soon-to-be-released Z390 platform. The test prototype is cocked at 2.6 GHz by default, has 18+2 MB cache, and managed to score 237.032 GOPS, making it slightly faster than a 4.4 GHz i7-8700K.
https://www.notebookcheck.net/Intel-Coffee-Lake-S-8-core-16-thread-CPU-spotted-in-SiSoft-Sandra-benchmarks.304906.0.html