QNAP TVS-473e, NAS, Tower, AMD Embedded R-Series SoC, RX-421BD, 8 GB, DDR4 QNAP TVS-473e. Type: NAS. Chassis type: Tower. Device class: Small & Medium Business. Processor family: AMD Embedded R-Series SoC, Processor model: RX-421BD, Processor frequency: 2.1 GHz. Internal memory: 8 GB, Internal memory type: DDR4. Total installed storage capacity: 8 TB, Installed storage drive type: HDD. Operating system installed: QNAP Turbo System