The TS-853BU-RP is a 2U rackmount NAS that easily fits into a standard 19-inch rack, providing an ideal storage solution in the server room for small and medium businesses. The TS-853BU-RP comes with a PCIe slot for boosting potential applications: the QNAP QM2 expansion card can be installed to add an M.2 SSD cache/10GbE connectivity, a compatible wireless card can be installed to use the TS-853BU-RP as a wireless access point, and a USB 3.1 10Gbps card can be added for easier backup to/from multiple external storage. The TS-853BU-RP also provides a wide range of value-added features: 4K video playback and real-time transcoding; deployment of virtual environments through Virtualization Station and Container Station; centralized management of remote Windows??, Linux?? and IPMI-compatible devices with QRM+; and web automation services with IFTTT Agent. 
??? PCIe slot supports installing a QNAP QM2 dual-port M.2 SSD/10GbE card, a compatible wireless adapter, or a USB 3.1 10Gbps card. 
??? Supports dual-channel 4K H.265/H.265 hardware decoding and on-the-fly or offline transcoding 
??? Qfiling automates file organization and Qsirch provides full-text search for easier file management 
??? QRM+ enables centralized management of remote Windows??, Linux?? and IPMI-compatible devices. 
??? A hybrid approach to virtualization in one NAS: Virtualization Station and Container Station 
??? Scalable storage space with VJBOD and UX-1200U-RP/UX-800U-RP expansion enclosures 
                    
                    
                                                    CPU
Intel Apollo Lake J3455 4-core 1.5GHz
                                                    System memory
4 GB DDR3L 2 x 2GB
                                                    Ram slot
SODIMM x 2 (MAX. 8GB)
                                                    Flash Memory
4GB eMMC
                                                    PCIe Slot
1 x PCIe gen 2 x 2 slot
                                                    Hard Drive Tray
8
                                                    Drive Interface
SATA 6Gb/s, 3Gb/s HDD or SSD, Hot-swappable
                                                    USB
4 x USB 3.0 (Rear)
                                                    LAN Port
4 x GbE
                                                    HDMI Output
1 x HDMI 1.4b
                                                    LED Indicators
System Status, HDD,USB, LAN
                                                    Buttons
Power, Reset
                                                    System Warning
Buzzer
                                                    Form Factor
2U, rack mountable
                                                    Power consumption (W) 
HDD sleep: 40.5W
 Typical Operation: 63.3W
                                                    Sound Level (dB) 
Operating low speed: 31.6 dB(A)
                                                    Temperature
0-40oC
                                                    Relative Humidity
0 to 95% R.H.
                                                    Power Supply
ATX 250W
                                                    Fan
2 x 70mm, 12V DC