WD Ultrastar DC SN640

3200 GB, 2.5"
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Product details

The Western Digital Ultrastar DC SN640 is a powerful SATA SSD specifically designed for use in servers and workstations. With a storage capacity of 3.2 TB, it provides ample space for large amounts of data and applications. The SSD utilizes NVMe technology over a PCIe interface, resulting in impressive read and write speeds of up to 3100 MB/s and 1800 MB/s, respectively. This high performance makes it ideal for data-intensive applications that require fast access times. The Ultrastar DC SN640 is also equipped with advanced security features, including AES encryption and password protection, to ensure the integrity and confidentiality of stored data. With a compact 2.5-inch form factor and a height of just 7 mm, it is versatile and fits into a variety of systems.

  • Maximum random 4k read performance of 468,000 IOPS
  • Maximum random 4k write performance of 115,000 IOPS
  • TLC NAND flash technology for improved performance and durability
  • Energy efficient with a power consumption of only 12 watts under load
  • Supports AES encryption for enhanced data security.

Key specifications

SSD type
SATA SSD
Interface
PCIe
Protocol
NVMe
Write transfer speed
1800 MB/s
Read transfer speed
3100 MB/s
Max. random 4K read
468000 IOPS
Max. random 4K write
115000 IOPS
Item number
15643021

General information

Manufacturer
WD
Category
SSD
Manufacturer no.
0TS1954
Release date
12.4.2021

Data storage properties

SSD type
SATA SSD
Form factor
2.5"
Storage capacity
3200 GB
Interface
PCIe
Protocol
NVMe
Read transfer speed
3100 MB/s
Write transfer speed
1800 MB/s
Memory type (NAND)
TLC
Max. random 4K read
468000 IOPS
Max. random 4K write
115000 IOPS
SSD Features
AES encryptionPassword protected

Power supply

Power consumption (standby)
5 W
Power consumption
12 W

Sustainability

Manufacturer commitment
SBTi

Voluntary climate contribution

CO₂-Emission
Climate contribution

Product dimensions

Length
10.05 cm
Width
6.99 cm
Height
0.70 cm
Weight
95 g

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Reviews & Ratings

Warranty score

How often does a product of this brand in the «SSD» category have a defect within the first 24 months?

Source: Digitec Galaxus
  • 9.Gigabyte
    0.7 %
  • 9.Kingston
    0.7 %
  • 9.WD
    0.7 %
  • 12.Crucial
    0.8 %
  • 12.Emtec
    0.8 %

Warranty case duration

How many working days on average does it take to process a warranty claim from when it arrives at the service centre until it’s back with the customer?

Source: Digitec Galaxus
  • 14.SanDisk
    2 days
  • 16.Seagate
    3 days
  • 16.Synology
    3 days
  • 16.WD
    3 days
  • 19.Samsung
    4 days

Return rate

How often is a product of this brand in the «SSD» category returned?

Source: Digitec Galaxus
  • 14.Lexar
    2.2 %
  • 14.Verbatim
    2.2 %
  • 16.WD
    2.4 %
  • 17.Crucial
    2.6 %
  • 18.Corsair
    2.9 %
Source: Digitec Galaxus