CPU AnnapurnaLabs Alpine AL324 ARM® Cortex-A57 quad-core 1.7GHz processor CPU Architecture 64-bit ARM Wake on LAN (WOL) Only the 2.5GbE port Floating Point Unit Encryption Engine System Memory 4 GB SODIMM DDR4 (1 x 4 GB) Maximum Memory 16 GB (1 x 16 GB) Memory Slot 1 x SO-DIMM DDR4 Flash Memory 512 MB (Dual boot OS protection) Drive Bay 5x 3.5-inch+ 4 x 2.5-inch SATA 6Gb/s Drive Compatibility 3.5-inch bays: 3.5-inch SATA hard disk drives 2.5-inch SATA hard disk drives 2.5-inch SATA solid state drives 2.5-inch bays: 2.5-inch solid state drives Hot-swappable 2.5 Gigabit Ethernet Port (2.5G/1G/100M) 2 (also support 10M) 10 Gigabit Ethernet Port 2 x 10GbE SFP+ Jumbo Frame USB 3.2 Gen 1 port 3 Form Factor Tower LED Indicators System Status, LAN, USB, HDD1~5, SSD1-4 Buttons Power, Reset, USB Copy Dimensions (HxWxD) 182.7 × 224.6 × 224.1 mm Weight (Net) 3.39 kg Weight (Gross) 4.99 kg Operating temperature 0 - 40 °C (32°F - 104°F) Relative Humidity 5-95% RH non-condensing, wet bulb: 27°C (80.6°F) Power Supply Unit External, 120 W, AC 100 to 240 V Fan 1 x 140mm, 12VDC Sound Level 18.6 db(A) System Warning Voice prompts or Buzzer Kensington Security Slot Max. Number of Concurrent Connections (CIFS) 1500