Anandtech published Intel Cascade Lake Xeon W-3200 Launched: Server Socket, 64 PCIe 3.0 lanes
A quote from the article:
One of the quiet announcements that came out of Apple’s new Mac Pro announcement was the launch of Intel’s next generation Xeon W processors. Aside from being completely under the radar from a formal announcement, the new line of workstation focused CPUs heralds a few quirks: they are Cascade Lake based, they are only in the LGA3647 socket, and they have 64 available PCIe 3.0 lanes.Intel Cascade Lake Xeon W-3200 Launched: Server Socket, 64 PCIe 3.0 lanes