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> I can confirm ECC works on it

"It works" as in it boots, or "it works" as in it checks and reports single-bit errors and reports double-bit errors?

What OS? If Linux, are you using rasdaemon? Does it confirm that the appropriate EDAC drivers are loaded and working?

Or is that data only available in the BMC's event log?

Fault injection has been used successfully and people have introduced manual errors that do get flagged - eg https://forum.asrock.com/forum_posts.asp?TID=24901&PID=10365...

For Linux support you need a very recent kernel - I forget how recent, but some reporting on it: https://www.phoronix.com/news/AMD-EDAC-Ryzen-7000-Series

Running azrock mb with a ryzen 9 3900x and Samsung b die ram… it’s pile of crap compared to asus mobo with the same plugins… ecc, I don’t know… what’s a proper ecc test today and is it worth sacrificing 12% in performance?

I tested that ECC was working on my Zen 3 + ASRock B550 setup by gradually undervolting the RAM more and more, and running Memtester[0] each time until Linux reported corrected errors.

[0] https://pyropus.ca./software/memtester/

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