QNAP TS-664 6-Bay NAS with 16GB RAM, 500GB (2 x 250GB) NVME Cache, and 36TB (6 x 6TB) of Western Digital Red Plus Drives Fully Assembled and Tested By CustomTechSales - Newegg.com
QNAP NAS Memory Upgrade Guide - Quick tutorial on increasing your RAM | TweakTown