I just put together a new PC with the following:
Z790 Pro RS WiFi (Bios v6.04)
i5-12600k w/ Deepcool AK620
G.Skill Trident Z5 32GB (2x16) (F5-6000J3636F16GX2-TZ5K)
Seasonic Focus GX-750
No GPU installed yet
Windows 11 Pro 64 bit
Before I installed Windows, I had ram in A2+B2, but it wouldn't...