6 Best Alternatives to the QNAP 6-Bay Desktop NAS Dual (2026)
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The QNAP TS-664 8G US 6 Bay Desktop NAS provides solid multi-gigabit throughput and dual NVMe caching slots. If you need qnap ts 664 8g us 6 bay desktop alternatives, you might want different specs, size, feature or brand. This guide lists 6 options that overlap with its core capabilities. You can compare processors, network ports, and drive bays across these models.
The original unit balances multi-drive capacity with 2.5GbE connectivity. Some buyers may prefer higher CPU power, native 10GbE ports, or 2.5-inch drive support. Others might seek a smaller footprint or a different brand ecosystem. Each alternative here addresses specific needs that the TS-664 may not cover. You can review the specifications to find the right fit for your storage tasks.
Our top pick: QNAP 6-Bay Desktop NAS with Dual 2.5GbE.
How each alternative compares
UGREEN 6-Bay Core i3 Desktop NAS
The UGREEN DXP6800 Plus swaps the QNAP’s Intel Celeron N5105 for a Core i3 processor, offering significantly higher raw computing power. It also upgrades connectivity to 10GbE, which is faster than the QNAP’s dual 2.5GbE ports for large file transfers. You lose the QNAP’s dual NVMe M.2 slots for caching, but gain a more robust CPU for demanding tasks. This model suits users who prioritize processing speed and network throughput over SSD caching flexibility. It is a desktop unit like the QNAP, but focuses on raw performance rather than multi-gigabit versatility.
UGREEN NASync 6-Bay NAS with 8K HDMI
The UGREEN DXP6800 Pro features a Core i5 processor and dual 10GbE ports, providing much higher network speeds than the QNAP’s 2.5GbE. It includes an HDMI interface, allowing direct display output, which the QNAP lacks. While the QNAP offers two M.2 NVMe slots for cache or storage, this UGREEN model relies on its strong CPU and fast networking for performance. It is ideal for users needing high-throughput local storage and multi-core processing power. The trade-off is the absence of dedicated NVMe caching slots found in the QNAP design, focusing instead on general processing and network speed.
UGREEN 6-Bay Core i3 Desktop NAS
The UGREEN DXP6800 Plus with Core i3 delivers strong processing power similar to the previous UGREEN model but is positioned as a budget option. It features a Core i3 CPU and 10GbE networking, outperforming the QNAP’s Celeron N5105 in raw speed. It includes an HDMI port, unlike the QNAP. You give up the QNAP’s dual NVMe M.2 slots for caching. This NAS is best for users who want high CPU performance and fast wired networking without needing dedicated media transcoding features. It offers a desktop form factor similar to the QNAP but focuses on core processing and network capacity.
QNAP 6-Bay 10GbE Desktop NAS
This QNAP model retains the six-bay desktop form factor but upgrades networking to native 10GbE SFP+ alongside dual 2.5GbE ports. This provides higher bandwidth than the TS-664’s dual 2.5GbE setup. It maintains the QNAP ecosystem and expandability options. You may need to check specific RAM and CPU specs for this variant, as they differ from the N5105/N5095 in the TS-664. It is the best choice if you need fast six-bay storage with high-speed 10GbE connectivity. It keeps the QNAP brand reliability while offering superior network speeds for backup and large file transfers.
Synology 6-Bay 2.5 Inch NAS DS620slim
The Synology DS620slim uses 2.5-inch drives instead of the QNAP’s 3.5-inch bays, offering a smaller footprint. It weighs 3.09 pounds, much lighter than the QNAP’s 10 pounds. It features expandable memory, unlike the QNAP’s fixed 8GB. However, it lacks the QNAP’s dual NVMe slots and 2.5GbE ports. It is designed for users needing compact storage with 2.5-inch drive compatibility. The Synology provides solid snapshot features and a white color option. It suits those prioritizing size and drive type over the QNAP’s higher network speeds and SSD caching capabilities.
QNAP TS-233 2-Bay NAS
The QNAP TS-233 is a 2-bay NAS, significantly smaller than the 6-bay QNAP TS-664. It has 2GB of RAM and a quad-core processor, suitable for basic home file storage. It lacks the QNAP’s dual 2.5GbE ports, dual NVMe slots, and high RAM capacity. This model is for users needing only two drive slots and basic file services. It is a compact desktop solution without the heavy processing power or multi-gigabit networking of the TS-664. It fits users building a small home server without needing the advanced features or high capacity of the six-bay alternative.
Quick picks
Our 7 picks
QNAP 6-Bay Desktop NAS with Dual 2.5GbE
Best for: multi-gigabit network storage and SSD caching
- Drive Bays
- 6 Bay
- Network Connectivity
- Dual 2.5GbE
- Processor
- Intel Celeron N5105/N5095
- RAM Capacity
- 8GB DDR4
- M.2 NVMe Slots
- Dual M.2 PCIe Gen3x2 NVMe slots
- Included Storage
- Diskless
View on Amazon: QNAP 6-Bay Desktop NAS with Dual 2.5GbE Affiliate link
This 6-bay desktop unit gives you an Intel Celeron 4-core processor paired with 8GB of DDR4 memory. You get dual 2.5GbE network ports for faster data transfers across your local network and two M.2 PCIe Gen3x2 NVMe SSD slots for caching or dedicated flash pools. It suits you if you need multi-drive storage capacity alongside high-speed local networking for backups and central media file management.
Pros
- Dual 2.5GbE network ports
- Dual M.2 PCIe Gen3x2 NVMe SSD slots
- Intel Celeron 4-core processor bursting up to 2.9GHz
- USB 3.2 Gen 2 Type-A ports with 10Gb/s transfer speeds
Cons
- 8GB DDR4 system memory is on-board and non-expandable
- USB connections are limited to Type-A ports
Good fit if
- You need six storage bays paired with multi-gigabit 2.5GbE networking.
- You plan to configure M.2 NVMe SSD cache acceleration or storage pools.
- You want 10Gb/s USB 3.2 Gen 2 ports for connecting external drives.
Skip if
- You need more than 8GB of RAM for heavier virtualization workloads.
- You require built-in 10GbE network ports out of the box.
Verdict: QNAP 6-Bay Intel Quad-Core Desktop NAS delivers solid multi-gigabit throughput and dual NVMe caching slots across a six-bay desktop form factor. It balances multi-drive capacity and 2.5GbE connectivity well, provided 8GB of non-upgradable RAM meets your workload demands.
UGREEN 6-Bay Core i3 Desktop NAS
Best for: Users needing high CPU power and 10GbE speed
- Drive Bays
- 6-Bay
- Network Connectivity
- 1x 10GbE, 1x 2.5GbE
- Processor
- Intel i3 1215u
- RAM Capacity
- 8GB DDR5
- M.2 NVMe Slots
- 2 slots
- Included Storage
- Diskless
View on Amazon: UGREEN 6-Bay Core i3 Desktop NAS Affiliate link
This 6-bay desktop NAS uses a 12th Gen Intel Core i3-1215U processor and includes two M.2 NVMe slots. It features one 10GbE and one 2.5GbE port for high-speed data transfer. The system supports RAID levels 0, 1, 5, 6, and 10, with a maximum capacity of 208TB. It runs a unified app for storage and file management. This unit is diskless and suits users needing strong processing power for local data control.
Pros
- 12th Gen Intel Core i3-1215U 6-core processor
- Dual 10GbE and 2.5GbE network ports
- Two M.2 NVMe slots for fast caching
- Supports RAID 0, 1, 5, 6, and 10
- Unified app for storage and file management
Cons
- No Wi-Fi support, wired Ethernet only
- Diskless design requires separate drive purchase
- Lacks 2.5GbE port aggregation flexibility found in other models
Good fit if
- You need high CPU performance for virtualization or Docker
- You require 10GbE connectivity for fast local transfers
- You want a single app for all NAS functions
Skip if
- You require wireless network connectivity
- You want a NAS with drives included
- You prefer a simpler single-port network setup
Verdict: UGREEN NASync DXP6800 Plus 6-Bay Desktop NAS fits users who prioritize raw processing power and high-speed wired networking for demanding local storage tasks.
UGREEN NASync 6-Bay NAS with 8K HDMI
Best for: high-speed networks requiring 10GbE throughput and multi-core processing
- Drive Bays
- 6-Bay
- Network Connectivity
- Dual 10GbE
- Processor
- 12th Gen Intel Core i5
- Form Factor
- Desktop
- Hardware Interface
- HDMI
View on Amazon: UGREEN NASync 6-Bay NAS with 8K HDMI Affiliate link
This desktop storage server provides six SATA drive bays alongside two M.2 NVMe slots, accommodating up to 208TB of total capacity. It runs on a 10-core 12th Gen Intel Core i5 processor and features dual 10GbE network interfaces supporting port aggregation up to 20Gbps. If you need high network bandwidth for multi-user file transfers, heavy local compute performance, and diverse RAID options like RAID 5, 6, or 10, this unit fits your environment.
Pros
- 10-core, 12-thread 12th Gen Intel Core i5 processor
- Dual 10GbE network ports with link aggregation up to 20Gbps
- Six SATA bays plus two M.2 NVMe slots supporting up to 208TB total storage
- Supports multiple configurations including RAID 0, 1, 5, 6, 10, and JBOD
Cons
- Requires a firmware update during setup as specified in product documentation
- No PCIe expansion slots documented in the specifications
Good fit if
- You need 10GbE or aggregated 20Gbps network connectivity directly out of the box.
- You run compute-heavy tasks that benefit from a 10-core Intel Core i5 processor.
- You want combined storage using both high-capacity SATA drives and fast M.2 NVMe media.
Skip if
- You do not possess a 10GbE local network to take advantage of the high-speed interfaces.
- You prefer modular, separate system packages over a single consolidated management application.
Verdict: UGREEN 6-Bay Dual 10GbE Core i5 NAS delivers robust processing performance and high-speed 10GbE interfaces for multi-drive local storage setups. It gives you flexible RAID arrays and fast caching options without needing network expansion cards.
UGREEN 6-Bay Core i3 Desktop NAS
Best for: High-performance local storage and fast networking
- Drive Bays
- 6-Bay
- Network Connectivity
- 1x 10GbE, 1x 2.5GbE
- Processor
- 12th Gen Intel Core i3
- M.2 NVMe Slots
- 2 slots
- Form Factor
- Desktop
- Hardware Interface
- HDMI
View on Amazon: UGREEN 6-Bay Core i3 Desktop NAS Affiliate link
The UGREEN NASync DXP6800 Plus is a 6-bay desktop NAS featuring a 12th Gen Intel Core i3 processor. It includes two M.2 NVMe slots and supports up to 208TB of storage. Network connectivity offers 10GbE and 2.5GbE ports. This unit bundles an 8K HDMI cable. It suits users needing strong processing power and high capacity for local data control.
Pros
- 12th Gen Intel Core i3 6-core processor
- 1x 10GbE and 1x 2.5GbE network ports
- 2 M.2 NVMe slots for fast storage
- Maximum capacity up to 208TB
Cons
- Only 4GB of RAM included
- No dedicated GPU for transcoding
- Limited to single 10GbE port
Good fit if
- You need high CPU performance for virtualization
- You want fast 10GbE network speeds
- You require large local storage capacity
Skip if
- You need multiple 10GbE ports for redundancy
- You require dedicated hardware transcoding
- You prefer a single unified app interface
Verdict: UGREEN NASync DXP6800 Plus 6-Bay NAS delivers strong processing power and high capacity for users who prioritize CPU performance and fast networking over dedicated media transcoding features.
QNAP 6-Bay 10GbE Desktop NAS
Best for: fast six-bay 10GbE network storage
- Drive Bays
- 6-Bay
- Network Connectivity
- 1x 10GbE SFP+, 2x 2.5GbE
- Processor
- AnnapurnaLabs Alpine AL524
- RAM Capacity
- 4GB
- Included Storage
- Diskless
- Form Factor
- Desktop
View on Amazon: QNAP 6-Bay 10GbE Desktop NAS Affiliate link
This six-bay desktop NAS runs on an AnnapurnaLabs Alpine AL524 quad-core 2.0GHz processor paired with 4 GB of RAM. For local network connectivity, you get one built-in 10GbE SFP+ port and two 2.5GbE ports out of the box. A PCIe Gen 3 x4 expansion slot lets you add M.2 storage or extra networking. It suits you if you need high-bandwidth networking across six drive bays for backups and file storage.
Pros
- Built-in single 10GbE SFP+ port and dual 2.5GbE ports
- PCIe Gen 3 x4 expansion slot for network cards or M.2 SSDs
- Supports memory expansion up to 16 GB including ECC RAM
- Dual USB 3.2 Gen 1 ports with One Touch Copy support
Cons
- Base configuration includes 4 GB of non-ECC memory
- Requires an optional PCIe card for M.2 SSD slots
Good fit if
- You have SFP+ hardware ready for 10GbE data transfers.
- You need six bays with dual 2.5GbE and 10GbE out of the box.
- You want the option to add ECC memory or PCIe expansion cards.
Skip if
- You require native onboard M.2 NVMe slots without using a PCIe slot.
- You need more than 4 GB of pre-installed RAM from the factory.
Verdict: QNAP 6-Bay 10GbE Desktop NAS pairs six drive bays with native 10GbE SFP+ and dual 2.5GbE ports. It provides high-capacity multi-gigabit storage and backup speeds with open PCIe expandability.
Synology 6-Bay 2.5 Inch NAS DS620slim
Best for: 2.5-inch drive users needing compact storage
- Drive Bays
- 6 Bay
- RAM Capacity
- 2GB DDR3L
- Included Storage
- Diskless
- Form Factor
- 2.5 Inch
- Dimensions
- 6.89 × 5.94 × 4.76 inches
- Weight
- 3.09 pounds
View on Amazon: Synology 6-Bay 2.5 Inch NAS DS620slim Affiliate link
The Synology DS620slim is a compact 6-bay NAS designed specifically for 2.5-inch drives. It features an expandable 2GB DDR3L memory and supports dual-channel H.265/H.264 4K video transcoding. The Advanced Btrfs file system allows for extensive snapshot management. This unit offers a small footprint with dimensions of 5.94 x 4.76 x 6.89 inches. It is ideal for users needing RAID flexibility with smaller form factor drives.
Pros
- Six bays optimized for 2.5-inch HDDs and SSDs
- Memory expandable from 2GB up to 6GB
- Dual-channel 4K video transcoding support
- Advanced Btrfs file system with 65,000 system-wide snapshots
- Compact physical dimensions suitable for tight spaces
Cons
- Base memory is only 2GB DDR3L
- Maximum single volume size is 108 TB
- Sold diskless with no included drives
Good fit if
- You prefer the smaller form factor of 2.5-inch drives
- You need a compact NAS that fits in limited spaces
- You require extensive snapshot capabilities for data protection
Skip if
- You require 3.5-inch drive bays for higher capacity
- You want pre-installed storage drives included
- You need more than 108 TB on a single volume
Verdict: Synology DS620slim 6-Bay 2.5 Inch NAS suits users who prioritize a small footprint and 2.5-inch drive compatibility. It provides solid snapshot features and expandable memory for focused storage tasks.
QNAP TS-233 2-Bay NAS
Best for: basic 2-bay home file storage
- Drive Bays
- 2 Bay
- Network Connectivity
- 1x Gb LAN
- Processor
- ARM Cortex-A55 Quad-core 2.0 GHz
- RAM Capacity
- 2 GB RAM
- Form Factor
- Desktop
- Dimensions
- 7.4 × 3.54 × 6.14 inches
View on Amazon: QNAP TS-233 2-Bay NAS Affiliate link
The QNAP TS-233 is a 2-bay desktop NAS designed for straightforward home storage. It uses a 64-bit Cortex-A55 quad-core processor running at 2.0 GHz and includes 2 GB of RAM. This unit features a minimalist design and supports data protection through snapshots. It is ideal for you if you need basic file sharing without the bulk or cost of a 6-bay system.
Pros
- 64-bit Cortex-A55 quad-core 2.0 GHz CPU
- 2 GB RAM for basic tasks
- Snapshots protect data from ransomware
- Compact desktop form factor
Cons
- Only 2 drive bays limit expansion
- Single Gigabit Ethernet port
- No mention of 10GbE support
Good fit if
- You need a simple 2-bay NAS
- You want a compact desktop unit
- You prioritize basic data protection
Skip if
- You require 6-bay storage capacity
- You need 10GbE networking
- You want high-performance computing
Verdict: QNAP TS-233 2-Bay Desktop NAS is a compact, entry-level solution for users who only need two drive slots and basic file services. It fits you if you are building a small home server without needing heavy processing power.
Specifications side by side
| Spec | QNAP 6-Bay Desktop NAS with Dual 2.5GbE | UGREEN 6-Bay Core i3 Desktop NAS | UGREEN NASync 6-Bay NAS with 8K HDMI | UGREEN 6-Bay Core i3 Desktop NAS | QNAP 6-Bay 10GbE Desktop NAS | Synology 6-Bay 2.5 Inch NAS DS620slim | QNAP TS-233 2-Bay NAS |
|---|---|---|---|---|---|---|---|
| Drive Bays | 6 Bay | 6-Bay | 6-Bay | 6-Bay | 6-Bay | 6 Bay | 2 Bay |
| Network Connectivity | Dual 2.5GbE | 1x 10GbE, 1x 2.5GbE | Dual 10GbE | 1x 10GbE, 1x 2.5GbE | 1x 10GbE SFP+, 2x 2.5GbE | not stated | 1x Gb LAN |
| Processor | Intel Celeron N5105/N5095 | Intel i3 1215u | 12th Gen Intel Core i5 | 12th Gen Intel Core i3 | AnnapurnaLabs Alpine AL524 | not stated | ARM Cortex-A55 Quad-core 2.0 GHz |
| RAM Capacity | 8GB DDR4 | 8GB DDR5 | not stated | not stated | 4GB | 2GB DDR3L | 2 GB RAM |
| M.2 NVMe Slots | Dual M.2 PCIe Gen3x2 NVMe slots | 2 slots | not stated | 2 slots | not stated | not stated | not stated |
| Included Storage | Diskless | Diskless | not stated | not stated | Diskless | Diskless | not stated |
| RAID Support | not stated | JBOD, Basic, RAID 0, 1, 5, 6, 10 | not stated | not stated | not stated | not stated | not stated |
| Form Factor | Desktop | Desktop | Desktop | Desktop | Desktop | 2.5 Inch | Desktop |
| Hardware Interface | M.2 NVMe | M.2 NVMe, HDMI | HDMI | HDMI | not stated | not stated | not stated |
| Number of Bays | 6-Bay | 6-Bay | 6-Bay | 6-Bay | 6-Bay | 6-Bay | 2-Bay |
| Processor Cores | Quad-Core | not stated | not stated | not stated | Quad-Core | not stated | Quad-Core |
| Weight | 10 pounds | not stated | not stated | not stated | 9.22 pounds | 3.09 pounds | 2.2 pounds |
| Dimensions | not stated | not stated | not stated | not stated | not stated | 6.89 × 5.94 × 4.76 inches | 7.4 × 3.54 × 6.14 inches |
| Size | 6 Bay | DXP6800 Plus,6-Bay (Diskless) | not stated | not stated | 6 Bay | 6-bay; 2GB DDR3L | Enclosure |
| Color | Black | Grey | not stated | not stated | Black | white | Enclosure |
| Model | TS-664-8G-US | DXP6800 Plus,6-Bay (Diskless) | DXP6800 Pro | not stated | not stated | DS620slim | TS-233 |
If you also configure compact utility spaces, you can evaluate midea 6 alternatives to compare hardware dimensions and energy ratings.
Frequently asked questions
Which NAS offers the best CPU performance for demanding tasks?
The UGREEN DXP6800 Plus is the top choice for raw processing power. It uses a Core i3 processor, which is more powerful than the Celeron chips found in many competitors. This model also includes 10GbE networking for faster data transfers. It is ideal if you need high speed for local storage workloads.
What is the best option for users who need 10GbE connectivity?
The QNAP 6-Bay 10GbE Desktop NAS is designed for high-speed network storage. It features native 10GbE SFP+ ports alongside dual 2.5GbE connections. This setup provides fast backup speeds and multi-gigabit throughput. It also allows for open PCIe expandability, giving you flexibility to add more network interfaces later.
Can I find a 6-bay NAS that supports 2.5-inch drives?
Yes, the Synology DS620slim supports 2.5-inch drives in a six-bay configuration. It has a compact footprint with dimensions of 5.94 by 4.76 inches. This model is suitable for users who want a small form factor without sacrificing drive capacity. It also offers expandable memory for focused storage tasks.
Is there a premium alternative with a Core i5 processor?
The UGREEN DXP6800 Pro is a strong premium option. It features a Core i5 processor and dual 10GbE interfaces. This model delivers robust processing performance for multi-drive local storage setups. It provides flexible RAID arrays and fast caching options without requiring additional network expansion cards.
What is the best budget-friendly 6-bay desktop NAS?
The UGREEN DXP6800 Plus is recommended as the best budget option. It delivers strong processing power and high capacity for users who prioritize CPU performance. It also offers fast networking capabilities. This model is suitable if you need high performance for local storage without paying for dedicated media transcoding features.
Which NAS is best for users who only need two drive slots?
The QNAP TS-233 is a compact, entry-level solution for basic file storage. It features two drive slots and a quad-core processor. It has 2GB of RAM and fits well in small spaces. This model is ideal for building a small home server without needing heavy processing power or large capacity.