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?