Hello, I have the same problem as @tommy7600 In the Bios 2004 beta, the NVME on the M.2_2 slot was not recognized. My system: X670E Hero7950X3D4090 Founders Edition64GB GSkill Ram (4x16GB) M2_1 : Samsung SSD 980 PRO 1TBM2_2 : WD Black SN850X 1TBM2_3 ...

I have the same problem.How did you go back to 1905? I always get the message no valid bios file via EZ Flash by 1904 or 1905

I installed BIOS 2004 on my ROG CROSSHAIR X670E HERO today. Now only 3 out of 4 NVME's are recognized. Slot M.2_2 is no longer recognized. But the NVME is definitely not broken.