QNAP TS-464 4-Bay NAS with 16GB RAM, 2TB (2 x 1TB) NVME Cache, and 40TB (4 x 10TB) of Western Digital Red Plus Drives Fully Assembled and Tested By CustomTechSales - Newegg.com
A-Tech 16GB Module for QNAP TS-332X TS-473 TS-673 TS-832X TS-873 TS-932X TVS-473 TVS-473e NAS Servers - DDR4 2400MHz PC4-19200 Non-ECC SODIMM 1.2V Memory RAM Replacement for QNAP RAM-16GDR4K0-SO-2400