The high-capacity TS-855X has six 3.5-inch SATA drive bays (for HDDs), two 2.5-inch SATA drive bays (for SSDs) and an 8-core processor supporting Intel® QuickAssist Technology (QAT), greatly assisting businesses in deploying a data storage and virtualization environment. The built-in 10GbE/2.5GbE high-speed connectivity helps realize fast data access, backup/restoration, file server, and virtualization applications. Running the QTS operating system as standard, the TS-855X can be switched to use the ZFS-based QuTS hero operating system based on your requirements. The TS-855X will be available and supported by QNAP for an extended period (up to 2027), ideal for businesses requiring matching NAS models deployed in long-term projects.
CPU
Intel ® Atom® C5125 8-core processor, 2.8GHz
CPU Architecture
64-bit x86
Floating Point Unit
✓
Encryption Engine
✓
System Memory
8 GB UDIMM DDR4 (1 x 8 GB)
Maximum Memory
128 GB (4 x 32 GB)
Memory Slot
4 x U-DIMM DDR4
Support ECC memory
Flash Memory
5GB (Dual boot OS protection)
Drive Bay
6 x 3.5-inch + 2 x 2.5-inch SATA 6Gb/s, 3Gb/s
Drive Compatibility
3.5-inch bays:
3.5-inch SATA hard disk drives
2.5-inch SATA solid state drives
2.5-inch bays:
2.5-inch SATA solid state drives
Hot-swappable
✓
M.2 Slot
2 x M.2 2280 PCIe Gen 3 x4 slots
SSD Cache Acceleration Support
✓
SR-IOV
✓
2.5 Gigabit Ethernet Port (2.5G/1G/100M)
2 (2.5G/1G/100M/10M)
10 Gigabit Ethernet Port
1 x 10GBASE-T
25 Gigabit Ethernet Port
Optional via PCIe expansion card
Wake on LAN (WOL)
✓
Jumbo Frame
✓
PCIe Slot
2
Slot 1: PCIe Gen 3 x4
Slot 2: PCIe Gen 3 x4
USB 2.0 port
1
USB 3.2 Gen 1 port
3
Form Factor
Tower
LED Indicators
Power/Status, LAN, USB, HDD1-6, SSD 1-2, M.2 SSD 1-2
Buttons
Power, Reset, USB Auto Copy
Dimensions (HxWxD)
231.9 × 292.9 × 319.8 mm
Weight (Net)
8.5 kg
Weight (Gross)
10.11 kg
Operating Temperature
0 - 40°C (32°F - 104°F)
Storage Temperature
-20 - 70°C (-4°F - 158°F)
Relative Humidity
5-95% RH non-condensing, wet bulb: 27˚C (80.6˚F)
Power Supply Unit
250W PSU, 100~240V
Power Consumption: Operating Mode, Typical
75.79 W
Tested with drives fully populated.
Fan
System fan: 2 x 80mm,
12VDC CPU fan: 1 x 90mm, 12VDC
Other Interfaces
Kensington security slot
System Warning
Buzzer
Kensington Security Slot
✓
Standard Warranty
3
Max. Number of Concurrent Connections (CIFS) - with Max. Memory
700
The high-capacity TS-855X has six 3.5-inch SATA drive bays (for HDDs), two 2.5-inch SATA drive bays (for SSDs) and an 8-core processor supporting Intel® QuickAssist Technology (QAT), greatly assisting businesses in deploying a data storage and virtualization environment. The built-in 10GbE/2.5GbE high-speed connectivity helps realize fast data access, backup/restoration, file server, and virtualization applications. Running the QTS operating system as standard, the TS-855X can be switched to use the ZFS-based QuTS hero operating system based on your requirements. The TS-855X will be available and supported by QNAP for an extended period (up to 2027), ideal for businesses requiring matching NAS models deployed in long-term projects.
CPU
Intel ® Atom® C5125 8-core processor, 2.8GHz
CPU Architecture
64-bit x86
Floating Point Unit
✓
Encryption Engine
✓
System Memory
8 GB UDIMM DDR4 (1 x 8 GB)
Maximum Memory
128 GB (4 x 32 GB)
Memory Slot
4 x U-DIMM DDR4
Support ECC memory
Flash Memory
5GB (Dual boot OS protection)
Drive Bay
6 x 3.5-inch + 2 x 2.5-inch SATA 6Gb/s, 3Gb/s
Drive Compatibility
3.5-inch bays:
3.5-inch SATA hard disk drives
2.5-inch SATA solid state drives
2.5-inch bays:
2.5-inch SATA solid state drives
Hot-swappable
✓
M.2 Slot
2 x M.2 2280 PCIe Gen 3 x4 slots
SSD Cache Acceleration Support
✓
SR-IOV
✓
2.5 Gigabit Ethernet Port (2.5G/1G/100M)
2 (2.5G/1G/100M/10M)
10 Gigabit Ethernet Port
1 x 10GBASE-T
25 Gigabit Ethernet Port
Optional via PCIe expansion card
Wake on LAN (WOL)
✓
Jumbo Frame
✓
PCIe Slot
2
Slot 1: PCIe Gen 3 x4
Slot 2: PCIe Gen 3 x4
USB 2.0 port
1
USB 3.2 Gen 1 port
3
Form Factor
Tower
LED Indicators
Power/Status, LAN, USB, HDD1-6, SSD 1-2, M.2 SSD 1-2
Buttons
Power, Reset, USB Auto Copy
Dimensions (HxWxD)
231.9 × 292.9 × 319.8 mm
Weight (Net)
8.5 kg
Weight (Gross)
10.11 kg
Operating Temperature
0 - 40°C (32°F - 104°F)
Storage Temperature
-20 - 70°C (-4°F - 158°F)
Relative Humidity
5-95% RH non-condensing, wet bulb: 27˚C (80.6˚F)
Power Supply Unit
250W PSU, 100~240V
Power Consumption: Operating Mode, Typical
75.79 W
Tested with drives fully populated.
Fan
System fan: 2 x 80mm,
12VDC CPU fan: 1 x 90mm, 12VDC
Other Interfaces
Kensington security slot
System Warning
Buzzer
Kensington Security Slot
✓
Standard Warranty
3
Max. Number of Concurrent Connections (CIFS) - with Max. Memory
700
