since some seem to have trouble with/stemming from ram
qvl is a guide, nothing more.
i have seen multiple kits not even post on stock/jedec, and non qvl running fine, one stable past xmp settings (cl16 vs 18, 1.33 vs 1.35v)., and that was one of those "oh-dont-buy-those.." corsair veng pro rgb.
issues with post/boot after ram tweak/oc, set soc to 1.025-1.05 since a lot of boards boost it too much on auto.
and anyone using memetest for anything but checking fsulty sticks, it won't find any errors related to xmp/oc/tweak.
not one rig out of a handful was stable with any settings memtest did 4 full passes on.
get hci, i paid for the deluxe version (15$) so i can boot from stick and not run os (blocking ram).
showed errors between seconds and up to an hour, where multiple others passed (memetest no matter if dos or in win, TM5 showed only intermittent).
run to 100% for quick test when oc/tweaking, to 1000%/overnight once you dialed in the settings.
that said
ram can do 4000/cl19 and 3866cl18@1.356,
but win gives whea (corrected, bus related), lowering iIF to 1800 fixes it.
anything i can try to get at least 1933 to work?