DS920+ memory

[Enquiries]

I was looking at your memory guide in the link below and noticed you had tested 16GB in the DS920+. This NAS has factory specs of a max of 8 GB, 4 on board and 4 expanded. Can you explain how this works and, if you know, why Synology wouldn't give that as a spec when the hardware can handle it.

Thanks!
https://nascompares.com/synology-nas-unofficial-memory-guide-2019-2020/