hi do you know if this is full end-to-end ECC checking for AMD X870 and X870E motherboards?
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Looking to buy Asus Prime X870. It shows ECC is supported but has anyone tested if actually does work? Other option is Asus B650 series ones. They have support for epyc so maybe ECC just works on it? I know Asrock supports ECC but they are not available here.
Pretty sure this is just reporting the standard “on-die ECC” that is part of the standard DDR5 specification. It’s not the full end to end ECC that you get on server motherboards.
The only Asus motherboards that I know support real ECC DDR5 UDIMM is from the ProArt series. Both the ProArt X670-E Creator Wifi and its 870E version are the only ones to to consider.
I have the X670E ProArt and 32GB of DDR5 ECC UDIMMS on this daily driver that is running in full 72 bit mode with error reporting and correction.
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Yes and no, but decent chance mostly it is. EC4 UDIMMs are differentiated from OCEC2 in the board specs and, as noted up thread, Asus X670E boards support EC4. I’m not seeing a corresponding X870[E] FAQ entry but EC4 on X870 Prime is similar positioning, an obvious ASRock compete, and B850 Prime’s speced the same way. That said, as of a few months ago Asus support was clearly clueless to answer this question.
RDIMM boards should support EC8, though, which isn’t possible in DDR5 UDIMMs.
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Asus made it official for all x670e: Links are not allowed here. Just search Which X670E motherboards can undergo full end-to-end ECC checking? This is offical title of faq page on asus website and their they answer for it.
But now my eyes are on Pro Art B650, it has official support for epyc 4004 series. Any idea if support for epyc means ecc checking is there too on it?
Here you go, you just need higher reputation:
https://www.asus.com/support/faq/1051605/
This has been already linked by @lemma in the previous reply 