so the asrockrack boards can’t do ECC either?
https://www.asrockrack.com/general/productdetail.asp?Model=B650D4U#Specifications
I also have this motherboard and have ECC UDIMMs working. I have this RAM running at 6000mhz and CL34, although I might try to get the timings down to CL32-40-40. I am running Ubuntu 22.04.4 LTS also.
When researching this, ASUS claims all B650 and X670 boards will support ECC UDIMMS as long as you have a 7000X series processor. No APUs.
https://zadak.biz/en/product/industrial-product/detail/industrial_dram/ddr5_ecc_udimm_
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I am wondering what the state of it is.
ASRock says that this board supports ddr5 ECC in its specs
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Ooooh… Considering that is a pretty budget-friendly board made for content creators, that is interesting news indeed. 
Didn’t someone have a big excel sheet of all consumer model boards for AM5? Did that list ECC support? I don’t remember and lost the link…
It doesn’t but most Asus boards do support ECC looking at the support section for each board.
This is probably what you’re looking for:
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