[wtallis]

AMD's previous socket was usually x16/x4/x4 for GPU/M.2/chipset. For AM5, they added another four lanes, so it's usually x16/x4+x4/x4 for GPU/(2x)M.2/chipset, unless the board is doing something odd with providing lanes for Thunderbolt ports or something like that.

[lmz]

Oh you're right. I didn't read the diagram correctly and the specs say 28 total lanes, 24 usable - probably because 4 go to the chipset.