Would also want to be careful about what voltage the bios is actually pushing when setting the XMP and double checking timings, my own board has a slight variance (Gigabyte X570 Master.) it's still within safe parameters but it's a bit below the 1.35 XMP standard as a comparable example. (1.25v stock default and 1.35v with XMP I believe up to 1.45 sometimes even 1.5 as generally OK but a bit higher than normal although this can vary a bit too.) Load line and vdroop and other stuff can also be a thing but probably more for CPU voltage and fluctuations, stuff can go pretty bad and even if it's a feature XMP is overclocking and is not guaranteed although in most cases it's supposed to work but sometimes one or more sticks could still go bad for any number of reasons. EDIT: Oh new page, well I think I've said all I can so trying the sticks individually will hopefully find the faulty one and hopefully it is just one stick and that's all there is no board issues or anything else.