Qnap 8 Bay Tower Nas 2.1ghz 4 Core Amdrx-421bd Processor (TS-873-4G) - CPU Processor: AMD R-Series RX-421ND quad-core 2.1 GHz processor, Turbo Core up to 3.4 GHz, Architecture: 64-bit, System Memory: 4 GB DDR4 (2 x 2 GB), Maximum Memory: 64 GB (4 x 16 GB), Memory Slot: 4 x SODIMM DDR4, Flash Memory: 512MB DOM, Connectivity: Drive Bay: 8 x SATA 6 Gbps, Gigabit Ethernet Port 4 x RJ45, PCIe Slot 2 x PCIe 3.0 x4, USB Port 4 x USB 3.0, Audio: Dynamic Microphone Jacks, Line-out Jack, Speakers, Dimensions (H x W x D): 188.2 x 329.3 x 279.6 mm, Net Weight: 6.56 kg (14.46 lbs), Power Supply Unit: 250W, 100-240V AC, 50/60Hz, Fan System: 2 x 120 mm