QNAP

QNAP TS-855X-8G-US 8-Bay 10GbE High-Performance NAS

Name: QNAP TS-855X-8G-US 8-Bay 10GbE High-Performance NAS
Brand: QNAP
SKU: TS-855X-8G-US

PCIe Gen 3

Empower Your Business with the QNAP TS-855X-8G-US 8-Bay NAS The QNAP TS-855X-8G-US is a high-performance 8-bay NAS designed for businesses seeking a robust and scalable storage solution. Featuring an 8-core processor, 10GbE connectivity, and support for both SATA HDDs and NVMe SSDs, this NAS deli...

$1,399.00*

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*Price sourced from Amazon.com. Last updated:Aug 27, 2026.Price and availability are subject to change — details.

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Overview

Empower Your Business with the QNAP TS-855X-8G-US 8-Bay NAS

The QNAP TS-855X-8G-US is a high-performance 8-bay NAS designed for businesses seeking a robust and scalable storage solution. Featuring an 8-core processor, 10GbE connectivity, and support for both SATA HDDs and NVMe SSDs, this NAS delivers exceptional performance for data storage, virtualization, and high-speed applications. With the ability to switch between QTS and QuTS hero operating systems, the TS-855X-8G-US offers unparalleled flexibility and long-term support for your evolving business needs.

Specifications:

Processor: Intel Atom C5125 8C 2.8GHz
Memory: 8GB U-DIMM DDR4 RAM (up to 128GB with ECC Support)
Drive Bays: Six 3.5-inch SATA drive bays, Two 2.5-inch SATA drive bays
10GbE Ports: Single 10Gbase-T (10G/5G/2.5G/1G/100M)
2.5GbE Ports: Dual 2.5GbE (2.5G/1G/100M)
M.2 Slots: Dual M.2 PCIe Gen 3 x4 NVMe SSD slots
PCIe Slots: Dual PCIe Gen 3 x4 slots
Operating System: QTS (standard), QuTS hero (optional)

Key Features

Intel Atom C5125 8C 2.8GHz processor and 8GB U-DIMM DDR4 RAM (up to 128GB with ECC Support).

Single 10Gbase-T (10G/5G/2.5G/1G/100M) and dual 2.5GbE (2.5G/1G/100M) ports accelerate file sharing across teams and devices or streamline large file transfers.

Dual M.2 PCIe Gen 3 x4 NVMe SSD slots enable cache acceleration or SSD storage pools for improved performance.

Dual PCIe Gen 3 x4 slots allow for installing additional Network adapters, QM2 cards, or Fibre Channel cards to increase application performance.

Backup Google Workspace & Microsoft 365 accounts and files to NAS with Boxafe

Specifications

Brand

QNAP

Model

TS-855X-8G-US

Bays

8-Bay

Processor

Intel Atom C5125 8C 2.8GHz

RAM

8GB U-DIMM DDR4

Max RAM

128GB (with ECC Support)

10GbE Ports

1 (10Gbase-T)

2.5GbE Ports

M.2 SSD Slots

2 (PCIe Gen 3 x4 NVMe)

PCIe Expansion Slots

2 (PCIe Gen 3 x4)

Backup Feature

Boxafe (Google Workspace & Microsoft 365)

Frequently Asked Questions

What type of processor powers the QNAP TS-855X-8G-US NAS?

The QNAP TS-855X-8G-US NAS is powered by an Intel Atom C5125 8C 2.8GHz processor, offering robust performance.

What is the maximum amount of RAM supported by this NAS?

This NAS supports up to 128GB of U-DIMM DDR4 RAM with ECC support, making it highly expandable for demanding tasks.

What networking speeds does the QNAP TS-855X-8G-US support?

It features a single 10Gbase-T port (10G/5G/2.5G/1G/100M) and dual 2.5GbE ports (2.5G/1G/100M) for high-speed connectivity.

Can I expand the storage performance of this NAS?

Yes, it includes dual M.2 PCIe Gen 3 x4 NVMe SSD slots, which can be used for cache acceleration or creating high-performance SSD storage pools.

What kind of expansion slots does this NAS provide?

The TS-855X-8G-US has dual PCIe Gen 3 x4 slots, allowing for the installation of additional network adapters, QM2 cards, or Fibre Channel cards to boost application performance.

Does this QNAP NAS offer cloud backup capabilities?

Yes, it allows you to backup Google Workspace & Microsoft 365 accounts and files to the NAS using Boxafe for enhanced data protection.

Strengths & Trade-offs

👍 Pros

Equipped with an Intel Atom C5125 8C 2.8GHz processor and 8GB U-DIMM DDR4 RAM, providing strong performance for demanding tasks.
RAM is expandable up to 128GB with ECC Support, offering significant headroom for future upgrades and data integrity.
Features a single 10Gbase-T port, supporting 10G, 5G, 2.5G, 1G, and 100M speeds for extremely fast file sharing and transfers.
Includes dual 2.5GbE ports, which accelerate file sharing across multiple teams and devices.
Offers dual M.2 PCIe Gen 3 x4 NVMe SSD slots, enabling robust cache acceleration or dedicated SSD storage pools for improved performance.
Provides dual PCIe Gen 3 x4 slots for installing additional network adapters, QM2 cards, or Fibre Channel cards, enhancing application performance and expandability.
Integrates with Boxafe for backing up Google Workspace & Microsoft 365 accounts and files to the NAS, adding a critical layer of data protection.
With 8 bays, it provides substantial storage capacity for large datasets and extensive media libraries.

👎 Cons

The base 8GB U-DIMM DDR4 RAM, while capable, may need upgrading to fully utilize the system's potential, especially for intensive applications.
The 8-bay design, while offering large storage, also implies a significant physical footprint and potentially higher power consumption than smaller NAS units.
Requires the purchase of hard drives separately, which adds to the overall cost of setting up the NAS.
The "ECC Support" for RAM is for expansion, meaning the included 8GB U-DIMM DDR4 RAM may not have ECC, which is a consideration for critical data.
Managing advanced network features like 10GbE and PCIe expansion may require a higher level of technical expertise from the user.