CPU AMD R-Series RX-421ND quad-core 2.1 GHz processor (Turbo Core to 3.4 GHz)
CPU Architecture 64-bit x86
Graphic Processors Optional via a PCIe adapter
Floating Point Unit
Encryption Engine (AES-NI)
Hardware-accelerated Transcoding Optional via a PCIe adapter
System Memory 4 GB SO-DIMM DDR4 (2 x 2 GB)
Maximum Memory 64 GB (4 x 16 GB)
Memory Slot 4 x SODIMM DDR4
For dual- or quad-DIMM configurations, you must use a pair of identical DDR4 modules.
Flash Memory 512 MB (Dual boot OS protection)
Drive Bay 4 x 2.5-inch or 3.5-inch
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
The following are not hot-swappable: M.2 SSDs, SSD cache drives, SSDs using PCIe expansion slots.
M.2 SSD Slot 2 x M.2 2280/2260 SATA 6Gb/s slots
The M.2 SSD is not included as standard.
M.2 SSD operations can easily generate excessive heat. It is recommended to install a heatsink (from QNAP or a third-party provider) on the M.2 SSD.
SSD Cache Acceleration Support
Gigabit Ethernet Port (RJ45) 4
Expandable with an optional PCIe adapter
10 Gigabit Ethernet Port Optional via a PCIe adapter
Jumbo Frame
PCIe Slot 2 x PCIe Gen 3 (x4)
USB 3.0 port 4
USB 3.1 Gen 2 (10Gbps) Port Optional via a PCIe adapter
IR Sensor (QNAP RM-IR004)
HDMI Output Optional via a PCIe adapter
Audio Input 2 x 3.5 mm dynamic microphone jacks
Audio Output 1 x speaker, 1 x 3.5 mm line-out jack
You cannot use the speakers and the line-out jack simultaneously.
Form Factor Tower
LED Indicators Status/Power, USB, LAN, Drive 1-4, M.2 SSD 1-2
Buttons Power, Reset, USB Auto Copy
Dimensions (HxWxD) 188.2 × 199.3 × 279.6 mm
Weight (Net) 4.9 kg
Weight (Gross) 6.05 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, 100-240V AC, 50-60Hz, 3.5A
Power Consumption: HDD Sleep Mode 33.24 W
Power Consumption: Operating Mode, Typical 56.23 W
With 4 x 2TB HDDs installed
Fan System: 1 x 120 mm
CPU: 1 x 60 mm
Sound Level 21.7 db(A)