I had bsod after a year on my system. Updated to latest bios and still bsod. Ran memtest and had errors like crazy on test 6 cpu6 . I also tried 1 stick at a time and a known pair of ram 1 stick at a time and still bsod. No error codes and AO always showed up on the Q code. Id say try memtest and see what if any errors occur. I had luxury of trying my cpu in a friend motherboard to confirm it was cpu and not motherboard
Maximus XI Formula, I9-9900k, Phantex Evolove X, Seasonic Titanium 850W, Custom loop PE360+SE360 Rad, G.Skill Trident Z F4-3200C14 32g, Nvidia Reference RTX 2080 TI, Samsung 970 EVO Plus 1Tb, Windows 11