NAS QNAP TS-251D-2G

CPU Intel® Celeron® J4025/J4005 2-core/2-thread processor, burst up to 2.9/2.7 GHz
CPU Architecture 64-bit x86
Graphic Processors Intel® HD Graphics 600
Floating Point Unit
Encryption Engine (AES-NI)
Hardware-accelerated Transcoding
System Memory 4 GB SO-DIMM DDR4 (1 x 4 GB)
Maximum Memory 8 GB (2 x 4GB)
Memory Slot 2 x SO-DIMM DDR4
For dual-DIMM configuration, you must use a pair of identical DDR4 modules.
Flash Memory 4GB (Dual boot OS protection)
Drive Bay 2 x 3.5-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 SATA hard disk drives
2.5-inch SATA hard disk drives
2.5-inch SATA solid state drives
Hot-swappable
M.2 Slot Optional via a QM2 PCIe adapter
SSD Cache Acceleration Support
Gigabit Ethernet Port (RJ45) 1
Expandable with an optional PCIe adapter
5 Gigabit Ethernet Port (5G/2.5G/1G/100M) Expandable with an optional PCIe adapter
10 Gigabit Ethernet Port Expandable with an optional PCIe adapter
Wake on LAN (WOL)
Jumbo Frame
PCIe Slot 1
Slot 1: PCIe Gen 2 x4
PCIe bandwidth limitations will restrict the NAS 10GbE performance.
USB 2.0 port 3
USB 3.2 Gen 1 port 2
USB 3.2 Gen 2 (10Gbps) Port Optional via a PCIe expansion card
IR Sensor (Optional QNAP RM-IR004 remote control)
HDMI Output 1, HDMI 2.0
Form Factor Tower
LED Indicators Power/Status, LAN, USB, HDD1-2
Buttons Power, USB copy, Reset
Dimensions (HxWxD) 168 × 105 × 226 mm
Weight (Net) 1.48 kg
Weight (Gross) 2.58 kg