NAS QNAP 473A 4-Bay, CPU AMD Ryzen V1000 series V1500B 4C 8T 2.2 GHz, RAM 8GB (1x 8GB) DDR4 (2 x SODIMM slots, max. 64GB total, optional ECC RAM support), 2.5 3.5 SAS 12Gbps, SAS SATA 6Gbps HDD (neinc