| Weight & dimensions |
| Width |
199.3 mm |
| Depth |
279.6 mm |
| Height |
188.2 mm |
| Weight |
4.84 kg |
| Power |
| Power supply location |
Built-in |
| Power supply unit (PSU) capacity |
250 W |
| Number of power supply units |
1 |
| Power consumption (typical) |
56.23 W |
| Power consumption (HDD standby) |
33.24 W |
| AC input voltage |
100 - 240 V |
| AC input frequency |
50 - 60 Hz |
| Operational conditions |
| Operating temperature (T-T) |
0 - 40 °C |
| Operating relative humidity (H-H) |
5 - 95% |
| Network |
| Ethernet LAN |
Y |
| Ethernet LAN data rates |
10,100,1000 Mbit/s |
| Wi-Fi |
N |
| DHCP client |
Y |
| DHCP server |
Y |
| Jumbo frames support |
Y |
| iSCSI support |
Y |
| Wake-on-LAN ready |
Y |
| Supported network protocols |
IFS/SMB, AFP (v3.3), NFS(v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, SMSC |
| Dynamic DNS (DDNS) |
Y |
| Ports & interfaces |
| Ethernet LAN (RJ-45) ports |
4 |
| USB port |
Y |
| USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity |
4 |
| PCI Express x4 (Gen 3.x) slots |
2 |
| Microphone in |
Y |
| Audio in/out |
Y |
| Memory |
| Internal memory |
4 GB |
| Internal memory type |
DDR4 |
| Maximum RAM supported |
64 GB |
| Memory slots |
4 x SO-DIMM DDR4 |
| Flash memory |
512 MB |
| Processor |
| Processor family |
AMD Embedded R-Series SoC |
| Processor model |
RX-421ND |
| Processor frequency |
2.1 GHz |
| Processor boost frequency |
3.4 GHz |
| Processor cores |
4 |
| Other features |
| Power management |
Y |
| Digital Living Network Alliance (DLNA) certified |
Y |
| Storage |
| Storage drives installed |
N |
| Number of storage drives supported |
4 |
| Installed storage drive type |
N |
| Supported storage drive types |
HDD & SSD |
| Storage drive interface |
Serial ATA III |
| Storage drive size |
2.5/3.5" |
| RAID support |
Y |
| Hot-swap drive bays |
Y |
| RAID levels |
0,1,5,6,10,JBOD |
| Supported file systems |
FAT32,HFS+,NTFS,exFAT,ext3,ext4 |
| Packaging content |
| Cables included |
AC, LAN (RJ-45) |
| Quick installation guide |
Y |
| Number of screws |
14 |
| Performance |
| Type |
NAS |
| Device class |
Home & Home Office |
| Backup function |
Y |
| Backup features |
Cloud, USB drive, iSCSI LUN |
| Multilingual support |
Y |
| Noise level |
21.7 dB |
| Web-based management |
Y |
| Share folder access right management |
Y |
| Security algorithms |
256-bit AES,FIPS 140-2,HTTPS,SNMP,SSH,SSL/TLS |
| Access Control List (ACL) |
Y |
| Reset button |
Y |
| On/off switch |
Y |
| Built-in iTunes server |
Y |
| Built-in FTP server |
Y |
| Browser supported |
Internet Explorer 10, Firefox 8, Safari 4, Google Chrome |
| System log |
Y |
| Hot spare |
Y |
| Password authentication |
Y |
| S.M.A.R.T. support |
Y |
| Share folder |
CIFS/SMB |
| Universal Plug and Play (UPnP) |
Y |
| Design |
| Chassis type |
Tower |
| Cooling type |
Active |
| Product colour |
Black |
| Number of fans |
2 fan(s) |
| Fan diameter |
12 cm |
| Fan diameter 2 |
6 cm |
| LED indicators |
Y |
| Built-in display |
Y |
| Cable lock slot |
Y |
| Cable lock slot type |
Kensington |
| Software |
| Operating system installed |
QNAP Turbo System |
| Operating system version |
4.3.4 |
| Windows operating systems supported |
Windows 10,Windows 7,Windows 8 |
| Linux operating systems supported |
Y |
| Mac operating systems supported |
Y |
| Server operating systems supported |
Windows Server 2003,Windows Server 2008 R2,Windows Server 2012,Windows Server 2012 R2,Windows Server 2016 |
