| Model | "Storage" QNAP TS-431X3-4G 4-Bay Quad-core Business NAS |
| Form Factor | Tower |
| CPU | Annapurna Labs Alpine AL-314 4-core 1.7 GHz |
| CPU Architecture | 32-bit ARM |
| Floating Point Unit | Yes |
| Encryption Engine | Yes |
| System memory | 4 GB SODIMM DDR3 (1 x 4 GB) |
| Maximum Memory | 8GB (1 x 8GB) |
| Memory Slot | 1 x SO-DIMM DDR3L |
| Flash Memory | 512 MB (Dual boot OS protection) |
| Drive Bay | 4x 3.5-inch SATA 6Gb/s, 3Gb/s |
| 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 | |
| Hot-swappable | Yes |
| SSD Cache Acceleration Support | Yes |
| 2.5 Gigabit Ethernet Port (2.5G/1G/100M) | 1 |
| 10 Gigabit Ethernet Port | 1 x 10GbE SFP+ |
| Jumbo Frame | Yes |
| USB 3.2 Gen 1 port | 3 |
| LED Indicators | Power, Status, LAN, USB, HDD1-4 |
| Buttons | Power, Reset, USB Auto Copy |
| Power Supply Unit | 90W Adapter, 100-240V |
| Operating Temperature | 0 - 40 °C (32°F - 104°F) |
| Dimensions (HxWxD) | 161 × 160 × 219 mm |
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