Synology 2019 Configuration Guide Part 3: 16GB RAM specs and how to upgrade your Synology DS918+ – Synoguide
Synology DS1621+ DiskStation with 16GB RAM, an E25G21-F2 25GbE Card and 48TB (6 x 8TB) of Synology Enterprise HAT5300 Drives Fully Assembled and Tested By CustomTechSales - Newegg.com
Synology Introduces The DiskStation DS916+ - StorageReview.com
A-Tech 8GB Memory RAM Stick for Synology DS916+ DiskStation - DDR3/DDR3L 1866MHz PC3L-14900 1.35V SO-DIMM Max Upgrade Module at Amazon.com