Western Digital Black SN770 250Gb NVMe SSD technical review

Posted on November 30, 2022 by Raymond Chen

What memory type installed in Western Digital Black SN770 250Gb and further specs watch in our article.

Western Digital Black SN770 250Gb NVMe SSD technical review

Black SN770 (250Gb) produced by Western Digital is powered by SanDisk controller. The Black SN770 comes equipped with TLC memory. NVMe SSD besides, available in 3 capacities, including 1 Tb, 500 Gb and 2 Tb.

Performance and benchmarks

This NVMe works on PCIe M.2 4.0 x 4 bus with read speeds 5150 MB/s, and sequential write speeds equals to 4900 MB/s. This model has input/output performance 650000 on reading and 800000 on writing operations.

Endurance and warranty

Western Digital provide 5-year warranty that limited by endurance 1200 TBW.


Category Value
Capacity 250 Gb
Interface M.2 4.0 x 4
Controller SanDisk
Memory type TLC
DRAM n/a
Read speed (Mb/s) 5150
Write speed (Mb/s) 4900
Read IOPS 650000
Write IOPS 800000
Endurance (TBW) 1200
MTBF (million hours) n/a
Warranty (years) 5


Western Digital Black SN770 250Gb use PCIe 4.0 that is twice faster than PCIe 3.0. The maximum write speed is 4900 Mbps, that is okay for this interface. The SSD provide possibility to write 1200 TBW, that is simply marvellous compared to nearest competitors. When everything is weighed in the balance, our editor recommend to purchase Western Digital Black SN770 250Gb for your PC.

+ Pros

  • Good writing speed
  • PCIe 4.0
  • Endurance

- Cons

  • Capacity

Buy this or similar SSD:

Video Review

WD Black SN770 SSD Review – Mid Range Gaming Greatness?


The Black SN770 250Gb has no DRAM or information about it is not known. Dynamic random-access memory (DRAM) makes drive faster, but more expensive.

The Western Digital Black SN770 due to the low density of memory chips can run with no additional heat sinks. Some laptops or motherboards designed with additional cooling below or above the storage for better performance during times of heavy loads.

The Black SN770 250Gb has sequential write speed 4900 Mb/s, maximum read speed 5150 Mbps. Storage operate on SanDisk controller and M.2 4.0 x 4 high-speed serial computer expansion bus standard. The NAND memory type is TLC.
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