Download media files without having to power up your PC with the built-in BitTorrent client. Y QNAP TS-431KX, NAS, Tower, Annapurna Labs, Alpine AL-214, 2 GB, DDR3 QNAP TS-431KX. Type: NAS. Chassis type: Tower. Device class: Small & Medium Business. Processor family: Annapurna Labs, Processor model: Alpine AL-214, Processor frequency: 1.7 GHz. Internal memory: 2 GB, Internal memory type: DDR3. Total installed storage capacity: 16 TB, Installed storage drive type: HDD. Operating system installed: QNAP Turbo System