We now have a detailed block diagram that shows off the new chipset for Intel’s LGA 1151 platform. Due to sharing the same socket, Z270 motherboards will be compatible with Skylake.

AMD X570 Ryzen 3000 Zen 2 Chipset Block Diagram Revealed With 24 PCIe 4.0 Lanes by Paul Lilly — Tuesday, May 21, 2019, 10:45 AM EDT Comments ...

LAN remains the same as well. 1 GbE, Intel recommends their Wireless-AC 9560 card for the motherboard manufacturers to pair this chipset with for 802.11ac and Bluetooth 5.

It's clear already that Ryzen 3000 CPUs (Matisse) and the X570 chipset will support PCIe 4.0. The new diagram once again confirms that the processor will provide a total of 24 PCIe 4.0 lanes.