The biggest differences versus the existing Z370 chipset appear to be USB and network functionality. There's no change in the number of PCIe lanes, it remains at 24. The Z390 has support for six USB 3.1 Gen 2 ports, ten USB 3.1 Gen 1 port, and another fourteen USB 2.0 ports! Another change is that most motherboards with the Z390 will feature 802.11ac WiFi and Bluetooth 5.0.
Achieve Gigabit wireless connections with 1st generation integrated Intel® Wireless-AC support. The Intel Z390 chipset integrates an Intel wireless 802.11ac and Bluetooth* 5 solution allowing you to connect up to Gigabit Wi-Fi speeds with Intel® Wireless-AC 9560. With no Ethernet cable required, your desktop will be ready for all current and future wireless use cases and has the flexibility to be located in more places within your home or office.