Synology DS923+ Dual-Core 4-Bay NAS, 32GB RAM, 24TB (4 x 6TB) of Western Digital Red Plus Drives Fully Assembled and Tested By CustomTechSales Desktop NAS - Newegg.com
Arch Memory AM-D4ES01-16G 16GB 260-Pin DDR4 2666MHz ECC So-dimm RAM for Synology DS3622xs+ NAS Systems at Amazon.com
New NAS, new RAM | Upgrading my DS923+ to 64GB RAM – Synoguide
Memory for your NAS – Crucial RAM for your Synology and QNAP Guide – NAS Compares