QNAP TDS-16489U-SA2 16-Bay Diskless Enterprise TurboNAS - Intel Xeon Processor E5-2620 (15M Cache, 2.00 GHz, 7.20 GT/s Intel QPI), 128GB DDR4 RDIMM RAM - Supports 16x 3.5"/2.5" SATA/SAS HDD (Front), 4x 2.5" SATA/SAS HDD(Back) - 4x USB 3.0, 2x Gigabit LAN Port, 4x SFRP+, 4x PCIe Gen3 - 3U Rackmount - 650W Power Supply - 5 Years Limited Warranty

Manufacturer Warranty: 5 Years Limited Warranty

Manufacturer Contact Info: https://www.qnap.com/i/au/,

The QNAP TDS-16489U-SA2 16+4 Bay Diskless Enterprise TurboNAS (TDS-16489U-SA2) combines application server functionality with storage server reliability.  By implementing a double-server architecture, the QNAP TurboNAS makes it easy to host multiple VMs for enabling network services while providing the necessary storage capacity, saving you the trouble and the cost of having to deploy two separate servers.  
 

Hardware features 

The QNAP TDS-16489U Hyperconvergence Enterprise NAS comes equipped with two enterprise-grade 2.4GHz Intel Xeon E5-2620 6-core processors and 128GB DDR4 RDIMM RAM for fast and efficient computing. Sixteen drive bays compatible with 3.5" SAS/SATA HDDs and 2.5" SSDs, along with four drive trays that support 2.5" SAS/SATA SSDs enable you to have a maximum raw internal capacity of 128TB available for your use case.  Four 10GbE SFP+ ports and dual Gigabit LAN interfaces help facilitate fast data transmission speeds.
 

The QNAP Dual-Server Enterprise TurboNAS unites efficient computing capability with immense storage capacity for enterprise network applications.  Its double-server functionality is designed to eliminate the latency between an application server and a storage server.

Read more about the QNAP TDS-16489U-SA2 20 Bay Rackmount NAS on QNAP's site HERE.