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Western Digital Ultrastar DC SN655 3.84 TB U.3 PCI Express 4.0 NVMe TLC 3D NAND

Western Digital Ultrastar DC SN655, 3.84 TB, U.3, 6800 MB/s

Best offerPrice trend

£5,371.99

Rising
Price trend
Detailed analysis
Price history of Western Digital Ultrastar DC SN655 3.84 TB U.3 PCI Express 4.0 NVMe TLC 3D NAND over the last 3 months
DatePrice
9 March 2026£2,775.99
15 March 2026£2,764.99
20 March 2026£2,780.99
27 March 2026£2,763.99
30 March 2026£2,786.99
5 April 2026£2,802.99
11 April 2026£8,133.99
18 April 2026£5,586.99
25 April 2026£5,354.99
1 May 2026£8,133.99
8 May 2026£5,310.99
16 May 2026£8,133.99
27 May 2026£8,133.99
2 June 2026£8,133.99

Compare Western Digital Ultrastar DC SN655 3.84 TB U.3 PCI Express 4.0 NVMe TLC 3D NAND prices UK

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Product Information

Data strategy, not just data storage
Ultrastar NVMe enterprise SSDs continue to be the ideal solution for cloud and server providers who need performant, high-capacity, cost-optimized, read-intensive performance for their data-intensive applications.

Unlocking the Full Potential of Enterprise SSDs
With dual-port redundancy and failover capability, end-to-end data protection and additional enterprise features, Ultrastar DC SN655 NVMe SSDs help ensure your data is secure and available when needed. With high-capacity, low-latency performance reaching up to 1.1M IOPs, storage providers are efficiently able to increase capacity for modern applications processing large unstructured datasets and are reducing time-to-insights of big data and enabling efficient machine learning.

Features
Ultrastar DC SN655 NVMe SSDs includes the next generation Western Digital NVMe 1.4b controller with PCIe Generation 4.0 interface and Western Digital BiCS5 TLC 3D NAND to enable higher capacities and performance at scale for increasingly larger application workloads. Designed and built for the standard 2.5” SSD storage infrastructure, the SN655 includes support for U.2 and U.3 backplanes and features power loss protection and 2.5M MTBF (projected) and 1.0 DW/D with a 5 year limited warranty.

Emerging Workloads
Ultrastar DC SN65x NVMe SSDs are optimized for cloud and scaleout workloads, providing high QoS consistency for the emerging workloads for big data, artificial intelligence, and machine learning that are increasing in size and complexity making them the ideal solution for scaling capacity and maximizing GB/watt.

Internal Solid State Drives Western Digital

Product

Name
Western Digital Ultrastar DC SN655 3.84 TB U.3 PCI Express 4.0 NVMe TLC 3D NAND

Weight & dimensions

Width
69.8 mm
Depth
100.3 mm
Height
14.9 mm
Weight
147.3 g

Operational conditions

Operating temperature (T-T)
0 - 70 °C
Storage temperature (T-T)
-40 - 85 °C

Other features

Warranty period
5 year(s)

Features

SSD capacity
3.84 TB
SSD form factor
U.3
Interface
PCI Express 4.0
NVMe
Yes
Memory type
TLC 3D NAND
Component for
Server/workstation
Hardware encryption
Yes
NVMe version
1.4
Read speed
6800 MB/s
Write speed
2600 MB/s
Random read (4KB)
980000 IOPS
Random write (4KB)
80000 IOPS
Uncorrectable Bit Error Rate (UBER)
< 1 per 10^15 bits read
Mean time between failures (MTBF)
2500000 h
Windows operating systems supported
Yes
Linux operating systems supported
Yes
Server operating systems supported
Yes

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