Interesting. Might be good for someone (not me!) to investigate then write in-depth info about. :) As a data point, I'm using a previous generation ASRock AM4

Interesting. Might be good for someone (not me!) to investigate then write in-depth info about. :) As a data point, I'm using a previous generation ASRock AM4 motherboard with ECC and that definitely works. I'm undervolting my cpu and ram, and very occasionally (every 6 months or so?) one of those seems to be generating a correctable ECC error that gets propagated to warning messages on my terminal. Haven't bothered investigating any further though. ;)