QNAP 12-bay 10GbE NAS and iSCSI/ IP-SAN. 2U, SAS 12G, SAS / SATA 6G, 4 x 1GbE, Build in 2 x 10GbE (SFP+), 40GbE-ready, Redundant PSU Port USB: 4 x USB3.0 + 4 x USB2.0 HDD Interface: 12 x 3.5-inch SAS 12Gbps, SAS / SATA 6Gbps / 3Gbps hard drive or 2.5-inch SAS / SATA SSD hard drive Port Others: Built-in 2 x 10 GbE (SFP+) and 4 x GbE 40GbE is optional Form Factor: 2U Processor: Intel Xeon E3-1246 v3 Family 3.5 GHz Quad-core Processor Default/ Max. Memory: System memory: 16 GB DDR3 non-ECC RAM Memory module pre-installed: 8 GB x 2 Memory expandable up to: 32 GB (8GB x 4) LEDs: 10 GbE, Status, LAN, Storage expansion port status Power: Power Consumption (W) Sleep mode: 80.41 In Operation: 166.58 W (with 12 x 1TB hard drive installed) Power Supply Redundant power: Input 90~264V AC; 650W x 2