QNAP TVS-873E-8G 8-Bay NAS AMD RX-421BD Quad-Core 2.1-3.4GHz 8GB DDR4 2xM.2 2 xPCIe 4xUSB3.0 2xHDMI 4K Hot-swappable 4xGigabit LAN Port USB Micro-B CPU Processor: AMD R-Series RX-421BD quad-core 2.1 GHz processor, Turbo Core up to 3.4 GHz Architecture: 64-bit Graphics: Embedded Radeon™ R7 graphics processor Encryption Engine: AES-NI System Memory 8 GB DDR4 (2 x 4 GB) Maximum Memory 64 GB (4 x 16 GB) Memory Slot 4 x SODIMM DDR4 (For dual- or quad-DIMM configurations, you must use a pair of identical DDR4 modules.) Flash Memory 512MB DOM Drive Bay 8 x SATA 6 Gbps Drive Compatibility • 3.5-inch SATA hard disk drives • 2.5-inch SATA hard disk drives • 2.5-inch SATA solid state drives M.2 SSD Slot 2 x M.2 2260/2280 SATA 6Gb/s SSDs Note: 1. The M.2 SSD is not included as standard. 2. M.2 SSD operations can easily generate excessive heat. It is recommended to install a heatsink (from QNAP or a third-party provider) on the M.2 SSD. SSD Cache Acceleration Support • Drive bays 1 to 8 • M.2 slots 1 to 2 • Optional: SSD using PCIe expansion slot Hot-swappable Yes The following are not hot-swappable: M.2 SSDs, SSD cache drives, SSDs using PCIe expansion slots. Gigabit Ethernet Port 4 x RJ45 USB QuickAccess Port USB Micro-B PCIe Slot 2 x PCIe 3.0 x4 Note: Support 10GbE LAN card, USB 3.1 Gen2 (10Gb/s) expansion card, QM2 card, or PCIe wireless network card. USB Port 4 x USB 3.0 (Front: 1; Back: 3) HDMI Output 2 x HDMI 1.4b (up to 3840 x 2160 resolution at 30 Hz) Audio • 2 x 3.5 mm dynamic microphone jacks • 1 x 3.5 mm line-out jack • 2 x speakers Note: You cannot use the speakers and the line-out jack simultaneously. Display Panel Monochrome backlit LCD display with Enter and Select buttons USB One Touch Copy Front: USB 3.0 IR sensor QNAP RM-IR004 remote control (MCE compatible) (sold separately) Form Factor Tower Dimensions (H x W x D) 188.2 x 329.3 x 279.6 mm 7.41 x 12.96 x 11.01 inch Net Weight 6.56 kg (14.46 lbs)