Yes, stress test it first. Give it a good work out, make sure there's no crashes or other odd behavior. Than you can think about bios flashes, if you do not already have the latest bios. For the board and the GPU it adds Resizable BAR support, so from that perspective it is worth it in some games. There's a very large R12 thread on this board, where others have shared a lot of valuable information on performance differences between bios versions etc... I would give it a read.
i7-11700kf, 32GB ram, and RTX 3080I ran the Dell hardware diagnosis and all the hardware seems to be working properly. What should I do next? Upgrade the bios to the latest version, then upgrade all driver and firmware?   
Aurora R12, first time setup, next steps?