Intel has disclosed the information about the upcoming Z390 chipset.
Intel Z390 gets Wireless-AC and USB 3.1 Gen2
After looking at the diagrams we can only see one main difference between Z390 and Z370 chipsets, the onboard Wireless-AC 802.11ac and Bluetooth 5. There are no changes to the number of PCIe lanes or memory support. There is, however, a change to USB 3.1 support. The Z390 supports Gen2 while Z370 only Gen1.
Throughout the marketing materials, Intel seems to underline the fact that Z390 is designed for unlocked processors (for overclocking). Sadly, there is no word about support for 8-core processors.
Intel:
The Intel® Z390 chipset and 8th Generation Intel® Core™ processors give you the edge you need to successfully defeat your rivals. Quickly upload and access your favorite streams and get the gaming boost you need with Intel® Turbo Boost Technology 2.0 and Intel® Hyper-Threading Technology (Intel® HT Technology)…
The appearance of Z390 on Intel website could further confirm that the launch is close, maybe even sooner than we thought. It might be worth watching Intel’s CEO keynote at Computex.
Intel Z390 vs Z370
Source: Intel