[absorber]

It's kind of vague and hit-and-miss though, even on non-NUC systems ASRock not always supports ECC. Supposedly it's because of AMD's (lack of) clarity about the matter (according to an ASRock rep, at least)

This is the mail I sent them in January. Still waiting for a response:

> (This is a pretty technical sales question)

> I wanted to know about the ECC compatibility of Asrock Rack X470D4U > In the specifications (https://www.asrockrack.com/general/productdetail.asp?Model=X...) it says the following:

> "*For Picasso Ridge and Raven Ridge CPUs, ECC is only supported with PRO CPUs."

> However, there is no such thing as "Picasso Ridge". There is however Pinnacle Ridge and Raven Ridge. Perhaps a mistake?

> So I was wondering what AMD CPUs had full ECC compatibility (so both detection and correction)

> Does the AMD Ryzen 5 1600 have full ECC support on that board, for example?

[walterbell]

Ryzen in general is all over the place, sometimes ECC works on systems even when the BIOS has not been officially validated to support ECC.

OEMs protect market segments with higher-priced devices, e.g. Ryzen Pro and EPYC/Xeon, which limits where AMD can offer "official" support for ECC.