Thanks, I poked around and realized the search is able to search within a thread too, just have to click some options.

I was looking at one of those "Nemix" kits on Newegg, figured that if they sell it for Denverton-based ASUSTOR NAS boxes, it would
probably work...
Replying to myself, but... I would suggest
avoiding the Nemix RAM kits. The one I received (2x32GB ECC)
does POST correctly. Per Qotom's warnings, there's a fairly long wait before you get a display and BIOS beep, but it does at least boot... but both sticks in the kit are throwing ECC errors in Passmark's free edition of Memtest. The Nemix kit I got
does have Micron chips on it, or at least they are labeled as Micron, but who knows if they are legit or counterfeit...
The FOSS
memtest86+
didn't throw any errors at all, but it did not seem to be monitoring ECC on this platform...
I have another 64GB kit on order, this set directly from Crucial/Micron (and it only cost like $10 more than the Nemix kit). , hopefully the legit Micron kit isn't tossing ECC errors and is clean.