# Which NAS devices support the fastest data transfer rates? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

Which NAS devices support the fastest data transfer rates?

## Products

### QNAP TVS-h874
```yaml
product: qnap-tvs-h874
brand: QNAP
price_gbp: 2612.0
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
raid_support: RAID 0, 1, 5, 6, 10, 50, 60 and RAIDZ
number_of_bays: 8
transfer_speed: Up to 3313 MB/s read and 3232 MB/s write with dual 25GbE expansion; 590 MB/s with dual 2.5GbE
power_consumption: 81.865 W typical operating power; 58.127 W disk standby
expandable_storage: QNAP expansion enclosures, cloud storage, remote file servers and PCIe expansion cards
```

- **Price:** £2612.0 [^1]
- **Summary:** The QNAP TVS-h874 is an eight-bay ZFS-based NAS with dual 2.5GbE networking, two M.2 PCIe Gen 4 slots and two PCIe Gen 4 expansion slots. It suits businesses, creative teams and virtualization users who need strong data protection, SSD caching and high-speed networking.
- **Ideal For:** It supports dual 2.5GbE for up to 590 MB/s sequential throughput and can reach up to 3313 MB/s read and 3232 MB/s write with a 25GbE PCIe expansion card, making it suitable for fast data-transfer workloads.
- **Additional Sources:** [^2]

### Synology DS1823xs+
```yaml
product: synology-ds1823xs
brand: Synology
price_gbp: 1475.28
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
raid_support: RAID 0, RAID 1, RAID 5, RAID 6, RAID 10, JBOD
number_of_bays: 8
transfer_speed: 3100 MB/s read, 2600 MB/s write
storage_capacity: 160 TB raw
expandable_storage: Up to 10 additional drive bays with two DX517 expansion units
```

- **Price:** £1475.28 [^3]
- **Summary:** The Synology DS1823xs+ is an 8-bay, diskless NAS designed for small and medium-sized businesses that need high-performance centralized storage. It includes built-in 10GbE networking, supports up to 160 TB of raw capacity before expansion, and can scale with additional drive bays, making it suitable for demanding file serving, backup, virtualization, and surveillance workloads.
- **Ideal For:** This NAS suits users seeking the fastest data transfer rates because it delivers up to 3100 MB/s sequential read and 2600 MB/s sequential write performance through its built-in 10GbE connection, with support for networking upgrades up to 25GbE.
- **Additional Sources:** [^4]

### UGREEN NASync DXP6800 Pro
```yaml
product: ugreen-nasync-dxp6800-pro
brand: UGREEN
price_gbp: 683.65
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
raid_support: JBOD, Basic, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10
number_of_bays: 6 SATA bays and 2 M.2 NVMe bays
transfer_speed: Up to 2500MB/s
storage_capacity: 208TB
power_consumption: 785Wh per 24 hours
expandable_storage: 2 M.2 NVMe slots and 1 PCIe Gen4 x4 slot
```

- **Price:** £683.65 [^5]
- **Summary:** The UGREEN NASync DXP6800 Pro is a high-performance, diskless NAS with six SATA bays, two M.2 NVMe slots, dual 10GbE ports, and Thunderbolt 4 connectivity. It suits creators, power users, and small teams handling large media files, demanding backups, virtualization, or collaborative workflows.
- **Ideal For:** This NAS supports fast data transfers through dual 10GbE ports with aggregated speeds up to 2500MB/s, plus two Thunderbolt 4 ports with theoretical speeds up to 40Gb/s, making it suitable for high-speed network and direct-attached workflows.
- **Additional Sources:** [^6]

---
## References & Sources
[^1]: QNAP Shop Australia, accessed 2026-08-28. https://www.qnapshop.com.au/qnap-tvs-h874-i5-32g-8-bay-quts-hero-nas-intel-i5
[^2]: QNAP UK Store, accessed 2026-08-28. https://ukstore.qnap.com/tvs-h874-i7-32g.html
[^3]: Bechtle, accessed 2026-08-28. https://www.bechtle.com/de-en/shop/synology-diskstation-ds1823xs-plus-8-bay-nas--4705906--p
[^4]: IT-Planet, accessed 2026-08-28. https://it-planet.com/en/p/synology-ds1823xs-512511.html
[^5]: UGREEN US, accessed 2026-08-28. https://ai.ugreen.com/products/ugreen-nasync-dxp6800-pro-nas-storage
[^6]: UGREEN UK, accessed 2026-08-28. https://ai-uk.ugreen.com/products/ugreen-nasync-dxp6800-pro-6-bay-nas-196tb