mw2108 failed to come up after a reboot, I checked via serial console and it shows a memory initialization warning during boot. I depooled it for now, it can be powered off for hardware analysis anyway (it's current in BIOS and not running the OS).

Do you have some memory test to validate whether that RAM is actually broken? If so, we can probably decommission the server, it's OOW since nearly two years.
(Not urgent, I know you're usually not in the DC on Fridays)