For the first few days after I built this PC with Crosshair X670e Extreme and a 7950x, during normal operation the Q-Code LEDs would read AA, as expected. But now it only briefly displays AA at the end of POST and then displays 81 permanently. Operation otherwise appears normal. Thing is, I can't find any entry in the manual for 81, and when I try to search for it on the internet, all I can find is "HDD ROM Error" that usually prevents booting. Now I do not currently have any HDDs in this box, only a single M.2, but I actually may well add some in the future and I would like to confirm that this is not an indicator that I would have issues if I tried.
Also, while I'm here - is there a way to disable C-States in the BIOS? I would normally expect to find such under CPU Configuration, but in this BIOS I am not seeing it. The manual doesn't seem to have a detailed BIOS section like I'm normally used to with high end Asus board.