QNAP TS-831X-4G-US Diskless System Network Storage Form Factor: 8-Bay Port RJ-45: 2 x 10 Gigabit SFP+ LAN ports 2 x Gigabit RJ45 LAN ports Port USB: 3 x USB 3.0 ports (Front: 1, Rear:2) HDD Interface: 8 x 3.5/2.5 SATA 6Gb/s HDDs / SSDs Processor: Annapurna Labs Alpine AL-314 Quad-core 1.7 GHz Cortex-A15 processor Default/ Max. Memory: 4GB DDR3 (1 x 4GB) LEDs: Status / Power, USB, HDD 1-8 Power: Power Consumption: HDD standby: 19.47 W In operation: 46.36 W (with 8 x 1TB HDDs installed) Power: ATX 250W, 110-240V AC, 50-60Hz, 3.5A