Luke takes a very indepth look at the ASUS ROG STRIX B550 I Gaming motherboard 00:00 Start 00:15 Introduction / The board 01:53 Rear mounted M.2 connector 03:05 Memory support / CPU socket 03:56 Top ...
As for the USB layout, the rear panel houses four USB 3.2 Gen 1 ports and two USB 2.0 ports. You can expand the former and latter by two and four via the internal headers on the motherboard.