| CPU | Processor: AMD R-Series RX-421BD quad-core 2.1 GHz processor, Turbo Core up to 3.4 GHz Architecture: 64-bit Graphics: Embedded Radeon™ R7 graphics processor Encryption Engine: AES-NI | 
| System Memory | 4 GB 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 | 512MB DOM | 
| Drive Bay | 6 x SATA 6 Gbps | 
| Drive Compatibility | • 3.5-inch SATA hard disk drives • 2.5-inch SATA hard disk drives • 2.5-inch SATA solid state drives | 
| M.2 SSD Slot | 2 x M.2 2260/2280 SATA 6Gb/s SSDs Note: 1. The M.2 SSD is not included as standard. 2. 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 | • Drive bays 1 to 6 • M.2 slots 1 to 2 • Optional: SSD using PCIe expansion slot | 
| Hot-swappable | Yes The following are not hot-swappable: M.2 SSDs, SSD cache drives, SSDs using PCIe expansion slots. | 
| Gigabit Ethernet Port | 4 x RJ45 | 
| USB QuickAccess Port | USB Micro-B | 
| PCIe Slot | 2 x PCIe 3.0 x4 Note: Support 10GbE LAN card, USB 3.1 Gen2 (10Gb/s) expansion card, QM2 card, or PCIe wireless network card. | 
| USB Port | 4 x USB 3.0 (Front: 1; Back: 3) | 
| HDMI Output | 2 x HDMI 1.4b (up to 3840 x 2160 resolution at 30 Hz) | 
| Audio | • 2 x 3.5 mm dynamic microphone jacks • 1 x 3.5 mm line-out jack • 2 x speakers Note: You cannot use the speakers and the line-out jack simultaneously. | 
| Display Panel | Monochrome backlit LCD display with Enter and Select buttons | 
| USB One Touch Copy | Front: USB 3.0 | 
| IR sensor | QNAP RM-IR004 remote control (MCE compatible) (sold separately) | 
| Form Factor | Tower | 
| Dimensions (H x W x D) | 188.2 x 264.3 x 279.6 mm 7.41 x 10.4 x 11.01 inch | 
| Net Weight | 5.63 kg (12.41) | 
| Power Consumption (W) | HDD standby: 35.11 W In operation: 63.69 W (with 6 x 2TB HDDs installed) | 
| Sound Level | 23.0 dB(A) | 
| Power Supply Unit | 250W, 100-240V AC, 50/60Hz, 3.5A | 
| Fan | System: 2 x 90 mm CPU: 1 x 60 mm | 
| Operating Temperature & Relative Humidity | 0 ~ 40˚C ( 32˚F ~ 104˚F ), 5 ~ 95% RH non-condensing, wet bulb: 27˚C (80.6˚F) | 
| Security Slot | Kensington security slot |