[solved] B650M/HDV.M2 BIOS memory stability issues

RAM support is a tricky beast, particularly since the IMC is located on the CPU
on modern CPUs. This means any change to the IMC or a CPU quality issue adversely effects
RAM compatibility. Another major issue is that RAM manufacturers will often change
the components of a particular model of RAM without warning or notification. It's
not uncommon to see 2 RAM modules of the same model number have completely different
physical RAM chips on them. So long as the RAM chips meet the technical specs
of the model they will change them (usually due to availability issues). I am
sure you can guess that this also hurts compatibility.

Fairly often, unless you are seeing a lot of other people with your board model
reporting the same issue, the problem is coming from the CPU not the actual board.
I have a brand new out the box 3600 that never worked with anything over JEDEC
speeds on any board I have tried it in. It's memory controller was borderline bad
right out the box. Unfortunately it had been sitting on a shelf for over a year
before I tested it so I missed my return window and AMD refused an RMA citing
that it worked as intended at it's rated RAM speeds.

As I said in response to your reply in essential's thread, make sure your support
ticket went through and that you received the automated confirmation email.