this has not changed in DDR5. but the 64 bits are splitted into 2x 32bits and both added 8 bits for ECC storage.In DDR4 and below, the ECC was an extra chip that was exposed , 8 bits for 64 bits wide
For example, DDR5 DIMMs feature two 40-bit (32 bits plus ECC) independent channelsAre you saying all of the documentation in multiple places from Micron itself is wrong? I don't think so. This is in their official specs.
My unregistered Micron modules report as 80bit FWIW.Interestingly, Kingston's registered ECC DDR5 module spec sheets show 2 x 40 bit = 80 bit ECC. https://www.kingston.com/datasheets/KSM48R40BD8KMM-32HMR.pdf.
On the Micron side, looking at the registered modules, it appears they offer both x72 and x80 ECC versions:
View attachment 27973
To me that is enough documentation to show that both x72 and x80 ECC DDR5 variants are in the wild.
What is the part number for yours?
You're right. Pasted the wrong part. That's what I get from posting on mobile.That is a non-ECC part.