QNAP 24-bay High Performance Unified Storage with Built-in 10GbE Port RJ-45: Built-in 2 x 10 GbE SFP+ ports (LAN-10G2SF-MLX) and 4 x GbE ports Port USB: 4x USB 3.0 port (rear) 4x USB 2.0 port (rear) HDD Interface: 24 x 3.5-inch SATA 6Gbps/3Gbps hard drive or 2.5-inch SATA, 6Gbps/3Gbps hard drive SSD hard drive Form Factor: 4U Processor: Intel Core i3-4150 processor Default/ Max. Memory: System memory: 8 GB DDR3 non-ECC RAM Memory module pre-installed: 4 GB x2 Memory expandable up to: 32 GB (8GB x4) LEDs: Status, 10 GbE, LAN, eSATA, storage expansion port status Power: Power Consumption (W): Sleep mode: 129.43 In Operation: 263.81W (with 24 x HITACHI HUS724020ALA640 hard drive installed) Power Supply: Redundant power: Input: 50-60Hz; 100-127V~ / 8.5A; 200-240V / 4.2A Output: 650W