Yep, looks like Micron B and other IC wouldn't run at these settings. If there is no problem with the mobo then it should pass 5000 at something like CL18-24-23 or 19-25-24. As I said in the earlier post, it will scale up to ~1.65V and to pass 4800, usually needs at least 1.55V. Since it's Micron then can't do much with the sub-timings.
I feel like Z690 mobos still need BIOS tuning. I was able to run Micron or Hynix up to 5400 on Z590I Unify and I see there are problems with 5000+ on most Z690. The same with dual-rank Samsung B. I could run my kit at 4400 on Z590 or B550/X570 and I can't even boot at 4200+ or XMP (4400) on Z690 mobos.
I feel like Z690 mobos still need BIOS tuning. I was able to run Micron or Hynix up to 5400 on Z590I Unify and I see there are problems with 5000+ on most Z690. The same with dual-rank Samsung B. I could run my kit at 4400 on Z590 or B550/X570 and I can't even boot at 4200+ or XMP (4400) on Z690 mobos.