CPU Intel® Xeon® D-1602 dual-core 2.5 GHz processor (burst up to 3.2 GHz) CPU Architecture 64-bit x86 Floating Point Unit Yes Encryption Engine (AES-NI) Hardware-accelerated Transcoding Yes System Memory 8 GB UDIMM DDR4 ECC (2 x 4 GB) Maximum Memory 128 GB (4 x 32 GB) Memory Slot 4 x Long-DIMM DDR4 For dual-DIMM configurations, you must use a pair of identical DDR4 modules. Flash Memory 5GB (Dual boot OS protection) Drive Bay 4 x 3.5-inch SATA 6Gb/s, 3Gb/s + 2 x 2.5-inch SATA 6Gb/s, 3Gb/s The system is shipped without HDD. For the HDD compatibility list, please visit https://www. qnap. com/compatibility/ 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 SATA solid state drives Hot-swappable Yes M. 2 SSD Slot 2 x M. 2 22110/2280 NVMe PCIe Gen3 x4 slots SSD Cache Acceleration Support Yes 2.5 Gigabit Ethernet Port (2.5G/1G/100M) 4 (also support 10M) 5 Gigabit Ethernet Port (5G/2.5G/1G/100M) Optional via an adapter Wake on LAN (WOL) Only the 2.5GbE port 25 Gigabit Ethernet Port Optional via an adapter Jumbo Frame Yes PCIe Slot 2 Slot 1: PCIe Gen3 x8 Slot 2: PCIe Gen3 x8 USB 3.2 Gen 1 port 3 Form Factor Tower LED Indicators System status, LAN, USB, Disk 1~6, M. 2 SSD 1~2 Buttons Power, Reset, USB Auto Copy Dimensions (HxWxD) 231.9 × 224.9 × 319.8 mm Weight (Net) 7.27 kg Weight (Gross) 8.72 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 250W PSU, 100~240V Power Consumption: Operating Mode, Typical 61.115 W Tested with drives fully populated. Fan