QNAP TS-853BU-RP-4G 8-Bay Diskless NAS - Intel Celeron Apollo Lake J3455 Quad-core 1.5GHz (up to 2.3GHz) CPU - 4GB DDR3L SODIMM RAM ( 2x 2GB, max 8GB total) - 2U Rackmount - 4GB eMMC - 8x 2.5"/3.5" SATA 6GB/s, 3GB/s HDD/SSD - 4x USB 3.0 (Rear) - 4x Gigabit Ethernet - 1x HDMI 1.4b port - ATX 250W Redundant Power Supply - Rails not included - 3 Years Limited Warranty

Manufacturer Warranty: 3 Years Limited Warranty

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

The QNAP TS-853BU-RP-4G 8-Bay Diskless NAS (TS-853BU-RP-8G) provides the high-speed performance, service availability, effortless scalability, and long-lasting durability businesses need in deploying a network storage solution for team collaboration, file sharing, and implementation of business applications.  The QNAP TS-853BU equips a quad-core Intel Celeron J3455 1.5GHz processor, 4GB of RAM provided by dual 2GB RAM modules, eight 3.5"/2.5" SATA drive bays, four USB 3.0 ports, quad Gigabit Ethernet LAN ports, a PCIe slot, one HDMI port, and two 250W power supplies.
 

Expansion options

The QNAP TS-853BU's PCIe slot lets you install a QNAP QM2 M.2 SSD expansion card to enable QNAP's Qtier storage system or implement SSD caching.  Install a 10GbE NIC instead to connect the NAS to 10GbE networks.  Or, a dual-port 10Gbps USB 3.1 expansion card for connecting external USB-enabled storage devices.
 

The QNAP TS-853BU NAS with 4GB of system memory and redundant power supplies allow businesses to deploy enterprise network applications that are always online 24x7.  Its 2U form factor allows easy installation in standard 19" server racks.

Read more about the QNAP TS-853BU-RP-4G 8 Bay Rackmount NAS on QNAP's site HERE.