| CPU | 2.1 GHz AMD R-Series RX-421ND Quad-Core (64-bit, up to 3.4 GHz) |
| Encryption Engine | AES-NI |
| System Memory | 8 GB of DDR4 RAM (2 x 4 GB) |
| Maximum Memory | 64 GB (4 x 16 GB) |
| Memory Slots | - 4 x SO-DIMM DDR4
- Note: For dual-or quad-DIMM configurations, you must use a pair of identical DDR4 modules
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| Flash Memory | 512 MB DOM |
| Drive Bays | 6 x SATA III 6 Gb/s |
| Drive Compatibility | - 3.5" SATA hard disk drives
- 2.5" SATA hard disk drives
- 2.5" SATA solid-state drives
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| M.2 SSD Slots | - 2 x M.2 2260/2280 SATA III 6 Gb/s SSDs (sold separately)
- Note: 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
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| SSD Cache Acceleration Support | - Drive bays 1 to 6
- M.2 slots 1 to 2
- Optional: M.2 SSD using QNAP QM2 PCIe expansion card
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| Hot-Swappable | Yes, except M.2 SSDs, SSD cache drives, and SSDs using PCIe expansion slots |
| Gigabit Ethernet Port | 4 x RJ45 Gigabit LAN ports |
| PCIe Slot | - 2 x PCIe 3.0 x4 slots
- Note: Supports a low-profile 10GbE LAN card, 10 Gb/s USB 3.1 Gen 2 expansion card, QM2 card, PCIe wireless network card, or a bus-powered graphics card
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| USB Ports | 4 x USB 3.0 Type-A ports (1 front, 3 rear) |
| Audio | - 2 x 3.5 mm dynamic microphone jacks
- 1 x 3.5 mm line-out jack
- 1 x speaker
- Note: You cannot use the speakers and the line-out jack simultaneously
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| USB One Touch Copy | Front: USB 3.0 |
| IR Sensor | Optional QNAP RM-IR004 remote control (MCE compatible) |
| Form Factor | Tower |
| Power Consumption | - HDD Standby: 35.11 W
- In Operation: 63.69 W
|
| Sound Level | Sound Pressure (LpAm): 23 dBA |
| Power Supply Unit | 250 W, 100 to 240 VAC, 50/60 Hz |
| Fan | - System: 2 x 90 mm
- CPU: 1 x 60 mm
|
| Operating Temperature | 32 to 104°F / 0 to 40°C |
| Relative Humidity | 5~95% RH non-condensing, wet bulb: 81°F / 27°C |
| Security Slot | Kensington security slot |
| Dimensions | 7.41 x 10.40 x 11.01" / 188.21 x 264.16 x 279.65 mm |
| Weight | 12.28 lb / 5.57 kg |
| Operating System | QTS 4.3.4 (embedded Linux) |
| Client Operating Systems | - Apple Mac OS 10.7 or later
- Linux and UNIX
- Microsoft Windows 7, 8, and 10
- Microsoft Windows Server 2003, 2008 R2, 2012, 2012 R2, and 2016
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| Supported Browsers | - Apple Safari 7 or later
- Google Chrome
- Microsoft Internet Explorer 10 or later
- Mozilla Firefox
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| Supported Languages | Chinese (traditional and simplified), Czech, Danish, Dutch, English, Finnish, French, German, Greek, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese (Brazil), Romanian, Russian, Spanish, Swedish, Thai, and Turkish |
| File System | - Internal Hard Drives
- EXT4
- External Hard Drives
- EXT3, EXT4, NTFS, FAT32, HFS+, and exFAT
- Note: To use exFAT you must purchase an exFAT driver license from License Center
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| Network & Virtual Switch | - TCP/IP: Dual stack (IPv4 and IPv6)
- Jumbo frame (failover, multi-IP settings, port trunking/NIC teaming)
- DHCP server and client
- USB Wi-Fi adapter (Note: This feature does not support ad hoc networks because of security considerations)
- Virtual Switch
- Virtual switch editing in Virtualization Station
- Combining virtual machines and containers in the same virtual switch
- Network Address Translation (NAT)
- Spanning Tree Protocol (STP)
- WirelessAP Station
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| Security | - Network access protection with auto-blocking (SSH, Telnet, HTTP(S), FTP, CIFS/SMB, and AFP)
- Host access control for shared folders (CIFS/SMB)
- 140-2 validated AES 256-bit volume-based and shared folder data encryption (FIPS)
- 256-bit external drive encryption (AES)
- Importing of SSL certificates from Let's Encrypt
- Instant alerts through email, SMS, push service, and audio
- 2-step verification
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| QVPN Service | - VPN Server
- Secure remote access with PPTP, L2TP/IPSec, and OpenVPN VPN services
- Support for a maximum of 100 clients
- Support for domain users
- VPN Client
- Support for PPTP, L2TP/IPSec, and OpenVPN VPN protocols
- OVPN file importing for creation of OpenVPN connections
- Easy VPN Connection (Windows VPN Utility)
- Note: QVPN combines an integrated VPN Server, a VPN client, and L2TP/IPSec VPN services
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| iSCSI (IP SAN) | - iSCSI targets with multiple LUNs per target (Note: The maximum number of targets is 256)
- LUN mapping and masking
- Online LUN capacity expansion
- SPC-3 persistent reservation
- MPIO & MC/S
- iSCSI Extensions for RDMA (iSER) with VMware ESXi (Note: This feature requires an Intel or AMD-based NAS with a PCIe slot, and a compatible Mellanox network card)
- iSCSI LUN backup, one-time snapshot, and restoration
- Virtual disks using iSCSI initiator (Note: The maximum number of virtual disks is eight)
- Stack chaining master
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