Western Digital Black SN770 1Tb SSD tech specs

Posted on December 03, 2022 by Raymond Chen

Western Digital's Black SN770 works on PCIe M.2 4.0 x 4. More details about this SSD on this site.

Western Digital Black SN770 1Tb SSD tech specs

Western Digital's 1Tb Black SN770 NVMe SSD works on SanDisk controller. The Black SN770 comes equipped with TLC flash memory. This NVMe besides, available in three capacities, including 500 Gb, 2 Tb and 250 Gb volume sizes.

Performance and benchmarks

Storage works on PCIe M.2 4.0 x 4 with read speeds 5150 Mbps, and sequential write speeds equals to 4900 Mbps. This model has IOPS 800000 on writing and 650000 on reading operations.

Endurance and warranty

Western Digital give 5 years warranty period limited by 1200 TBW.


Category Value
Capacity 1 Tb
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 1Tb may work on PCIe 4 that is significantly faster than PCIe 3. The sequential write speed is 4900 Mbps, that is common for this expansion standard. The SSD has endurance 1200 TBW, that is pretty good compared to closest competitors. Weighing all these factors, our site advise to purchase Western Digital Black SN770 1Tb for your PC.

+ Pros

  • Good writing speed
  • PCIe 4.0
  • Capacity
  • Endurance

- Cons

  • None

Buy this or similar SSD:

Video Review

How can it be this good? WD_BLACK SN770 NVMe SSD 1TB Review


The Western Digital Black SN770 is DRAMless SSD or information about it is unknown. Dynamic random-access memory (DRAM) makes drive faster, but more expensive.

The Western Digital Black SN770 1Tb due to the low density of memory chips able to last with no additional heat sinks. Some motherboards already has thermal pads below or above the drive to enhance productivity during times of high loads.

The Western Digital Black SN770 1Tb has maximum write speed 4900 Mbps, sequential read speed 5150 Mb/s. NVMe operate on SanDisk controller and M.2 4.0 x 4 interface standard. The NAND memory type is TLC.
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