Question - Setting Bios to Auto, PEG or PCIe?

I am very sure that I overlook something in the manual, but is PEG 0 or 1 the graphic card and what is the other?

PEG Slot One full height PCI-32 slot One full-height Gen 3 PCIe x4 slot For 11th Generation processors: One full-height Gen 4 PCIe x16 slot

peg and slot Attach the single slot uprights or twin slot uprights on the wall and hook in the PANEL peg board with European standard hole grid Add hooks, holders and trays

pegasus power slot In the newer version, you can see from the middle pictures above, the slot is shorter and wider peg comapared with the old But are