QNAP

QNAP TS-435XeU-4G-44S-US 4-Bay Rackmount NAS 10GbE

Name: QNAP TS-435XeU-4G-44S-US 4-Bay Rackmount NAS 10GbE
Brand: QNAP
SKU: TS-435XeU-4G-44S-US

4GB DDR4PCIe Gen 3

High-Performance Rackmount NAS for Demanding Business NeedsThe QNAP TS-435XeU-4G-44S-US is a 4-bay high-speed short-depth rackmount NAS designed for businesses requiring robust storage solutions. Equipped with a Quad Core Marvell Octeon CPU, 4GB DDR4 memory, and dual 2.5GbE and 10GbE network conn...

$989.00*

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*Price sourced from Amazon.com. Last updated:Aug 28, 2026.Price and availability are subject to change — details.

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Overview

High-Performance Rackmount NAS for Demanding Business Needs

The QNAP TS-435XeU-4G-44S-US is a 4-bay high-speed short-depth rackmount NAS designed for businesses requiring robust storage solutions. Equipped with a Quad Core Marvell Octeon CPU, 4GB DDR4 memory, and dual 2.5GbE and 10GbE network connectivity, this NAS delivers exceptional performance and scalability.

Pre-installed Drives: Four 4TB Seagate IronWolf drives pre-installed and pre-configured with RAID 5 for hassle-free setup.
Data Recovery Services: Seagate IronWolf drives include a robust 3-year Rescue Data Recovery Services plan.
Processor: Marvell OCTEON TX2 CN9130 / CN9131 ARMv8 Cortex-A72 Quad Core 2.2 GHz processor.
Memory: 4GB DDR4 RAM (up to 32GB).
Network Connectivity: Dual 2.5GbE (2.5G/1G/100M) ports for accelerated file sharing.
10GbE Networking: Future-proof your NAS server with Dual 10GbE networking.
SSD Caching: Dual M.2 PCIe Gen 3 x1 NVMe SSD slots enable cache acceleration or SSD storage pools for improved performance.
Backup Solutions: Backup Google Workspace & Microsoft 365 accounts and files to NAS with Boxafe.
Surveillance: Comprehensive surveillance solution for 24/7 security with QVR Pro.
Data Protection: Create a disaster recovery plan with ransomware protection using QNAP’s storage snapshot solution.

Key Features

Four 4TB Seagate iron Wolf drives pre-installed and pre-configured with RAID 5. Hassle-free!

Seagate IronWolf drives include a robust 3-year Rescue Data Recovery Services plan

Marvell OCTEON TX2 CN9130 / CN9131 ARMv8 Cortex-A72 Quad Core 2.2 GHz processor and 4GB DDR4 RAM (up to 32GB

Dual 2.5GbE (2.5G/1G/100M) ports accelerates file sharing across teams and devices or streamline large file transfers

Future-proof your NAS server with Dual 10GbE networking

Dual M.2 PCIe Gen 3 x1 NVMe SSD slots enable cache acceleration or SSD storage pools for improved performance

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

Comprehensive surveillance solution for 24/7 security with QVR Pro

Create a disaster recovery plan with ransomware protection using QNAP’s storage snapshot solution

Specifications

Drive Bays

Included Drives

4x 4TB Seagate IronWolf

RAID Configuration

RAID 5 (pre-configured)

Processor

Marvell OCTEON TX2 CN9130 / CN9131 ARMv8 Cortex-A72 Quad Core 2.2 GHz

RAM

4GB DDR4 (expandable to 32GB)

Ethernet Ports

Dual 2.5GbE, Dual 10GbE

SSD Slots

Dual M.2 PCIe Gen 3 x1 NVMe

Form Factor

Rackmount

Data Recovery Service

3-year Seagate Rescue Data Recovery Services

Frequently Asked Questions

What drives are included with the QNAP TS-435XeU-4G-44S-US NAS?

This NAS comes with four 4TB Seagate IronWolf drives pre-installed and pre-configured with RAID 5 for immediate use.

Can the RAM in this NAS be upgraded?

Yes, the 4GB DDR4 RAM is upgradeable, supporting up to 32GB for enhanced performance.

What network connectivity options does this QNAP NAS offer?

It features dual 2.5GbE ports for accelerated file sharing and dual 10GbE networking for future-proofing high-speed connections.

Does this NAS support SSD caching?

Yes, it includes dual M.2 PCIe Gen 3 x1 NVMe SSD slots, which can be used for cache acceleration or to create SSD storage pools.

What kind of processor is in the QNAP TS-435XeU-4G-44S-US?

It is powered by a Marvell OCTEON TX2 CN9130 / CN9131 ARMv8 Cortex-A72 Quad Core 2.2 GHz processor.

Does this NAS provide data protection features against ransomware?

Yes, it includes QNAP’s storage snapshot solution, which helps create a disaster recovery plan and offers ransomware protection.

Is data recovery service included with the pre-installed drives?

Yes, the Seagate IronWolf drives include a robust 3-year Rescue Data Recovery Services plan.

Strengths & Trade-offs

👍 Pros

Comes with four 4TB Seagate IronWolf drives pre-installed and pre-configured with RAID 5 for immediate use.
Seagate IronWolf drives include a robust 3-year Rescue Data Recovery Services plan, adding a layer of security.
Powered by a Marvell OCTEON TX2 CN9130 / CN9131 ARMv8 Cortex-A72 Quad Core 2.2 GHz processor, ensuring efficient operation.
Includes 4GB DDR4 RAM, upgradeable up to 32GB, allowing for future performance enhancements.
Features dual 2.5GbE ports, accelerating file sharing and large file transfers across networks.
Future-proofs the NAS server with dual 10GbE networking capabilities for high-speed connectivity.
Offers dual M.2 PCIe Gen 3 x1 NVMe SSD slots for cache acceleration or dedicated SSD storage pools, boosting performance.
Supports backup of Google Workspace & Microsoft 365 accounts and files to NAS with Boxafe for data protection.
Provides a comprehensive surveillance solution with QVR Pro for 24/7 security monitoring.
Includes QNAP’s storage snapshot solution, creating a disaster recovery plan with ransomware protection.

👎 Cons

The base 4GB DDR4 RAM might be limiting for highly demanding applications without an upgrade.
While offering 10GbE, the presence of only dual 2.5GbE ports for standard network connections might be a bottleneck for some users without 10GbE infrastructure.
The NVMe SSD slots are PCIe Gen 3 x1, which is a slower interface compared to Gen 3 x4 or Gen 4 options, potentially limiting SSD performance.
The initial storage configuration of 4x4TB drives in RAID 5 yields an effective capacity of 12TB, which may not be enough for very large data archives without expansion.
The specific ARMv8 Cortex-A72 processor, while efficient, may not match the raw processing power of some x86-based NAS systems for intensive tasks.
The "hassle-free" pre-configuration might limit customization options for advanced users who prefer to set up RAID levels themselves.