[juergbi]

Many retail AM4 motherboards support ECC with retail Ryzen CPUs. At least on Linux it works as expected. ECC UDIMMs can be difficult to find but it shouldn't be necessary to buy a TR Pro for ECC if memory capacity, I/O lanes and the performance of AM4 Ryzen CPUs suffice.

[oso2k]

I haven't looked into deeply but I've heard stories from others with Ryzen boxes that ECC features of the RAM are turned off with Ryzen CPUs installed. Supposedly you can see this in Linux w/dmidecode or other tools. I'd appreciate good links if anybody has them.

PS: https://www.reddit.com/r/Amd/comments/lh3m42/demystifying_ry...

https://www.reddit.com/r/Amd/comments/ggmyyg/an_overview_of_...

[c0l0]

Ryzen APUs (i.e., Socket AM4 CPUs with with integrated AMD graphics) do _not_ support ECC UDIMM, _unless_ they carry a "Pro" in their name.

Ryzen CPUs without an iGPU _will_ support ECC UDIMM, _unless_ the mainboard specs specifically tell you that it won't support ECC, or simply omit mentioning ECC UDIMM at all.

Fwiw, I've enjoyed proper ECC on an ASRock Fatal1ty B450 Gaming-ITX/ac with a Ryzen 5 3600 for more than two years now (using GNU/Linux; I am not sure how Windows would fare).

[oso2k]

Interesting. Thank you for the info.