[YetAnotherNick]

[1] says AM4 doesn't support reporting:

> While the X570D4U-2L2T and its predecessors the X470D4U series supports ECC memory, there is a bit of a gotcha. As readers noted in the original X470D4U reviews, while ECC memory is supported and performing error correction, the reporting of that error correction was not functioning. In other words, even if you were experiencing continuous memory errors, no log of those errors was being recorded in the IPMI event log where one might expect them to show up. A user over on the Level One Techs forums had a conversation thread with someone from ASRock Rack, who reported that while the AM4 platform had ECC support, it did not have error reporting support.

[2] says:

> However we got AMD official respond today. AM4 does not support ECC error reporting function

[1]: https://www.servethehome.com/asrock-rack-x570d4u-2l2t-review...

[2]: https://forum.level1techs.com/t/asrock-rack-x470d4u2-2t/1475...

[theevilsharpie]

This is referring to ECC as reported from an out-of-band management controller on those specific motherboards. This needs either some platform-level integration into the memory controller (which is unlikely to be present on consumer Ryzen), or an driver/agent running on the host OS that captures ECC events and sends them to the out-of-band management controller.

Standard ECC events are handled by the OS, and don't depend on (or otherwise interact with) an out-of-band management controller or any other external device. This works fine on Ryzen.