In the past, it was super easy to find a block diagram illustrating that architecture on the Web. For Windows 10, I can't find anything. I've found subsystem diagrams, Windows 7 or earlier ...

Over at the chiphell forums, a block diagram leaked of the AMD X570 Chipset. The diagram is not an official AMD one, however does seem to originate from a motherboard partner, and that does show ...

Another block diagram of a more official nature leaked ... clear to follow as everything can be re-routed and shared. For example, PCIe slots, M.2 SSDs, LAN, card readers or WiFi modules are ...