Western Digital Blue SN550 250Gb SSD technical specifications

Posted on November 07, 2022 by Raymond Chen

What memory type installed in Blue SN550 (250Gb) produced by Western Digital and extra characteristics explore here.

Western Digital Blue SN550 250Gb SSD technical specifications

Western Digital's 250Gb Blue SN550 internal SSD works on SanDisk 20-82-01008-A1 controller. The Blue SN550 comes equipped with SanDisk 3D TLC memory. This drive is offered also in 1 Tb and 500 Gb capacities.

Performance and benchmarks

This NVMe use PCIe M.2 3.0 x 4 expansion standard with read speeds 2400 MB/s, and maximum write speeds 1950 MB/s. It also has IOPS 405000 on writing and 410000 on reading operations.

Endurance and warranty

Manufacturer provide 5 years warranty period limited by 600 TBW.


Category Value
Capacity 250 Gb
Interface M.2 3.0 x 4
Controller SanDisk 20-82-01008-A1
Memory type SanDisk 3D TLC
DRAM n/a
Read speed (Mb/s) 2400
Write speed (Mb/s) 1950
Read IOPS 410000
Write IOPS 405000
Endurance (TBW) 600
MTBF (million hours) n/a
Warranty (years) 5


Western Digital Blue SN550 250Gb may work on previous bus standard that is twice slower than PCIe Gen4. The write speed is 1950 Mb/s, that is slower than has most of competitors. The Internal SSD provide possibility to write 600 TBW, that is really good against competitors. When everything is weighed in the balance, Western Digital Blue SN550 250Gb has more minuses and our editor strongly do not advise to spend money for it.

+ Pros

  • Endurance

- Cons

  • Slow writing speed
  • PCIe 3.0
  • Capacity

Buy this or similar SSD:

Video Review

WD Blue SN550 NVMe m.2 SSD Review: BEST budget SSD!


The Western Digital Blue SN550 250Gb has no DRAM or information about it is unknown. DRAM makes storage faster, but more expensive.

The Western Digital Blue SN550 due to the low density of memory chips can operate without additional cooling systems. Some laptops or motherboards from the factory has additional cooling below or above the drive for improving performance during times of high loads.

The Blue SN550 250Gb has maximum write speed 1950 Mb/s, maximum read speed 2400 Mb per second. Storage run on SanDisk 20-82-01008-A1 controller and M.2 3.0 x 4 interface standard. The NAND flash memory type is SanDisk 3D TLC.
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