Intel tips off Z390 and X399 chipsets in RST driver release notes
 

Intel's mainstream desktop chipset for the overclocking crowd hasn't changed much in the two generations since Z170 entered the market alongside the company's Skylake chips in mid-2015. The big addition with Z270 was support for the manufacturer's Optane cache modules, and Z370 didn't seem to be much different aside from some changes regarding power delivery for the accompanying six-core Coffee Lake processors. The release notes for the latest version of Intel's Rapid Storage Technology drivers hint at Z390 and X399, two future chipsets that could potentially offer new features.

https://techreport.com/news/33565/in...-release-notes