Thanks for sharing your input.

Today my MSI B550m Mortar arrived and guess what. Everything now works as it should. No crashes after 4 hours of testing, gaming and using the system. Everything else is the same.
RAM runs at 3600 cl14 again. Didn't try going higher yet but I don't even...

Aright, this is actually infuriating.

B550m Aorus Pro does not work with Ryzen 5800x, period. I Tried different PSUs (750w), different RAM (Samsung/Hynix), different GPUs (gtx 980/RTX 3070/ 6800xt), differen CPUs(!) and it's always the same. The PC randomly shuts down during idle and/or...

Thanks a lot, will try immediately. F11m was still unstable for me, even on default JEDEC settings. Starting to think it's some other component being faulty. Losing my mind slowly....

Thanks a million! I've been losing my mind getting this thing to work stable. Running tests right now, looks promising! Will report back after testing it some more.

For those who are interested, I am on:

Ryzen 7 5800x
B550m Aorus Pro
Patriot Viper Steel 4000mhz,...

Any update for the B550M Aorus Pro? Been having random crashes on my 5800x on practically any flck on all the BIOS versions and would love to test the F11m.