I've been checking back on my board's BIOS section regularly, though this current BIOS is not too shabby.
The previous BIOS (5.10) was AGESA 1.0.0.6 but 5.30 reads "Update AMD AGESA Combo-AM4 1.0.0.1" so I'm not sure what to make of that. Looking at the BIOS history it seems once a "Bridge BIOS" is released AGESA code gets rolled back and then incremental updates are released thereafter?
I don't really care I suppose, so long it works.
OK, I downloaded it for my ASUS and ASRock boards for mt 3900x's. Dor ASRock, I set it to 3600.1800 and I got a bppt and timings were right. Subtimings must be off, since my latency is 80ns. On the ASUS board I ad to swap memory, and manually set the timings to 16,15,15,15,36. I have spent all afternoon on this. I give up.
I tried using the Ryzen dram calculator on the ASUS board, but even using "safe" settings, it would not even boot. So I give up
Any idea how to get from 80 to 64 ns using a minimal of subtimings ?