Question Can someone please help with chips by SK Hynix

[JadeHarley]

What is this two "??"
H5AN8G8N??R-VKC
I found some old answers here, but it doesnt help, mine modules from Dec 2019 so it should be H5AN8G8NCJR-VKC, but when I overlock it as CJR, it's not even working on 2933 (safe)

 

[JadeHarley]

It seems impossible to solve, topic is closed I suppose