| Brand | QNAP |
| EAN | 4713213512845 |
| ASIN | B07C4Q724M |
| Model | TS-1685-D1521-8G |
| MPN | TS-1685-D1521-8G |
| AC input frequency | 50 - 60 Hz |
| AC input voltage | 100 - 240 V |
| Backup features | Cloud,iSCSI LUN |
| Backup function | Yes |
| Browser supported | Internet Explorer 10, Firefox 8, Safari 4, Google Chrome |
| Built-in display | Yes |
| Built-in FTP server | Yes |
| Built-in iTunes server | Yes |
| Cables included | AC,LAN (RJ-45) |
| Chassis type | Tower |
| Cooling type | Active |
| Depth | 319.8 mm |
| Device class | Home & Home Office |
| DHCP Client | Yes |
| DHCP server | Yes |
| Display type | LCD |
| ECC supported by processor | Yes |
| Embedded options available | No |
| Enhanced intel speedstep technology | Yes |
| Ethernet LAN | Yes |
| Ethernet LAN data rates | 10,100,1000,10000 Mbit/s |
| Execute disable bit | Yes |
| Fan diameter | 9.2 cm |
| Fan voltage | 12 V |
| Flash memory | 512 MB |
| Height | 303.8 mm |
| Hot spare | Yes |
| Hot-swap drive bays | Yes |
| Idle states | Yes |
| Installed storage drive type | No |
| Intel 64 | Yes |
| Intel enhanced halt state | Yes |
| Intel trusted execution technology | Yes |
| Intel TSX-NI | Yes |
| Internal memory | 8 GB |
| Internal memory type | DDR4 |
| iSCSI support | Yes |
| Jumbo frames support | Yes |
| LED indicators | Yes |
| Link aggregation | Yes |
| Linux operating systems supported | Yes |
| Mac operating systems supported | Yes |
| Maximum internal memory supported by processor | 128 GB |
| Maximum number of PCI Express lanes | 32 |
| Memory channels supported by processor | Dual |
| Memory types supported by processor | DDR3-SDRAM,DDR4-SDRAM |
| Multilingual support | Yes |
| Number of fans | 5 fan(s) |
| Number of storage drives supported | 16 |
| On/off switch | Yes |
| Operating system installed | QNAP Turbo System |
| Operating system version | 4.3 |
| PCI Express configurations | 1x16,1x4,1x8 |
| PCI Express slots version | 2.0,3.0 |
| Power management | Yes |
| Power supply location | Built-in |
| Processor ARK ID | 91202 |
| Processor boost frequency | 2.70 GHz |
| Processor cache | 6 MB |
| Processor code | SR2DF |
| Processor codename | Broadwell |
| Processor family | Intel® Xeon® D |
| Processor frequency | 2.40 GHz |
| Processor lithography | 14 nm |
| Processor model | D-1521 |
| Processor operating modes | 64-bit |
| Processor package size | 37.5 x 37.5 mm |
| Processor series | Intel Xeon D-1500 |
| Processor socket | BGA 1667 |
| Quick installation guide | Yes |
| RAID levels | 0,1,5,6,JBOD |
| RAID support | Yes |
| Reset button | Yes |
| S.M.A.R.T. support | Yes |
| Scalability | 1S |
| Security algorithms | 256-bit AES,FIPS 140-2,SNMP,SNMPv3,SSH |
| Share folder | CIFS/SMB |
| Storage drive size | 2.5/3.5" |
| Storage drives installed | No |
| Supported file systems | FAT32,HFS+,NTFS,ext3,ext4 |
| Supported network protocols | IPv4, IPv6, MB2/SMB3, NFS v3/NFS v4, FTP, FTPS, TFTP, HTTP, HTTPS, SSH, iSCSI, SNMP, SMTP, SMSC |
| Supported storage drive types | HDD,SSD |
| System log | Yes |
| Thermal monitoring technologies | Yes |
| Type | NAS |
| UART | Yes |
| USB port | Yes |
| Wake-on-LAN ready | Yes |
| Web-based management | Yes |
| Weight | 13.4 kg |
| Wi-Fi | No |
| Width | 369.9 mm |
| Windows operating systems supported | Windows 10,Windows 7,Windows 8 |