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QNAP TS-855X-8G, 8-Bay NAS, Intel Atom C5125 8-core processor, 2.8GHz, 8 GB SODIMM DDR4 (1x 8 GB), 1 x 10Gbe/2 x2.5Gbe, PCIe

High-performance 8-core NAS for flexible deploying hybrid-infrastructure storage and high-speed virtualization applications 
  • Intel ® Atom® C5125 8-core 2.8GHz processor, supports up to 128 GB DDR4 ECC memory
  • Two built-in 2.5GbE ports; two PCIe Gen 3 x4 slots for 5/10/25GbE expansion cards
  • Two M.2 PCIe NVMe slots for SSD caching and Qtier auto-tiered storage; long-term support models (up to 2027)

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.


2.5GbE/10GbE connectivity

Dual-port 2.5GbE and single-port 10GbE connectivity. The dual 2.5GbE ports also support SMB Multichannel for up to 5 Gbps!

Flexible storage expansion

Connect TL-R1620Sep-RP / TL-R1220Sep-RP JBOD units to the TS-855X for adding up to 48 additional drive capacity to match your business growth.

Flexible PCIe Gen3 expansion

Features two PCIe Gen 3 slots for installing 5/10/25GbE network cards, QM2 cards or Fibre Channel cards.

M.2 SSD caching

Dual M.2 PCIe NVMe slots enable SSD caching, SSD storage pools, or Qtier™ auto-tiered storage.

Virtual machines and containers

Host virtual machines and containerized apps on one device to optimize resource utilization and IT budgeting. Supports SR-IOV.

All-inclusive data backup and restoration

A reliable backup center for your PC/Macs, virtual machines, containers, cloud data, and SaaS data.

Ultimate 8-core performance with up to 128 GB RAM and Intel® QuickAssist Technology

The TS-855X delivers exceptional 8-core performance for running multiple concurrent tasks. AES-NI encryption and Intel® QuickAssist Technology (QAT) are supported to offload resource-demanding compression and improving IPsec/SSL cryptography performance. The TS-855X comes with four UDIMM DDR4 slots (8 GB preinstalled) that can be upgraded to 128 GB ECC RAM for higher workloads. Combining high performance, reliability, and capacity, the TS-855X is an all-round budget-friendly storage solution for diverse applications, such as file servers, high-speed storage/backup/recovery, and virtualization.

M.2 PCIe slots for SSD caching and accelerated AI-powered image recognition

The TS-855X comes with two M.2 PCIe Gen 3 slots that allow for installing M.2 2280 NVMe SSDs (including SSD brands of Micron®, Seagate® and WD®) or Edge TPU (sold separately) to boost NAS performance.



CPU Intel ® Atom® C5125 8-core processor, 2.8GHz
CPU Architecture 64-bit x86
Floating Point Unit  
Encryption Engine (AES-NI)
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
The following are not hot-swappable: M.2 SSDs, SSD cache drives, SSDs using PCIe expansion slots.
M.2 Slot 2 x M.2 2280 PCIe Gen 3 x4 slots
The M.2 SSD is not included as standard.
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  
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)
Only the 2.5GbE port
Jumbo Frame  
PCIe Slot 2
Slot 1: PCIe Gen 3 x4
Slot 2: PCIe Gen 3 x4
Card dimensions for PCIe slot 1:150 x 68.9 x 18.76 mm / 5.90 x 2.71 x 0.74 inches.
Card dimensions for PCIe slot 2:150 x 68.9 x 18.76 mm / 5.90 x 2.71 x 0.74 inches.
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
SKU TS-855X-8G
Barcode # 4711103084007
Brand QNAP
Shipping Weight 5.8000kg
Shipping Width 0.280m
Shipping Height 0.280m
Shipping Length 0.280m

Manufacturer Warranty: 2 Years Manufacturer Warranty

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QNAP TS-855X-8G, 8-Bay NAS, Intel Atom C5125 8-core processor, 2.8GHz

Model # TS-855X-8G

  • SKU: TS-855X-8G

SAVE $410.00 (13%)
In Stock

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