10:00.x
is the primary pci slot and 11:00.x
the secondary.
The initial display output is NOT choosable! Use the Aorus X570 for that instead! E.g. https://download.gigabyte.com/FileList/Manual/mb_manual_x570-aorus-elite-wifi_1002_e_v1.pdf#page=30 (but that one only has one 16x slot!)
If you want to pass a whole usb controller to a VM it gets a bit tricky.
Your best bet is 0000:0b:00:x
. However, that includes the front USB ports, some USB2 header, a couple USB ports on the back (only some!) AND the bluetooth device. (I have to admit it was funny to see the VM showing bluetooth capabilities).
But it is workable.