Western Digital Black SN850X 2Tb NVMe tech specs

Posted on February 05, 2024 by Raymond Chen

Should you buy Black SN850X (2Tb) produced by Western Digital and more characteristics watch here.

Western Digital Black SN850X 2Tb NVMe tech specs

Western Digital Black SN850X 2Tb works on SanDisk 20-82-20035 controller. This internal SSD has Dynamic-Random Access Memory LPDDR4 for mapping data, located on the internal SSD. The Black SN850X comes equipped with 112L Bics5 flash memory. NVMe SSD besides, available in 4 Tb and 1 Tb capacities.

🚀 Performance and benchmarks

This NVMe works on PCIe M.2 4.0 x 4 interface with maximum read speeds 7300 MB/s, and maximum write speeds equals to 6600 Mbps. This model has IOPS 1200000 on reading and 1200000 on writing operations per second.

🖥️ Endurance and warranty

Western Digital give 5 years warranty for this product that limited by 2400 Total Bytes Written.

📊 Specs

Category Value
Capacity 2 Tb
Interface M.2 4.0 x 4
Controller SanDisk 20-82-20035
Memory type 112L Bics5
Read speed (Mb/s) 7300
Write speed (Mb/s) 6600
Read IOPS 1200000
Write IOPS 1200000
Endurance (TBW) 2400
MTBF (million hours) n/a
Warranty (years) 5


Western Digital Black SN850X 2Tb use PCIe Gen4 that is twice faster than PCIe 3. The sequential write speed is 6600 Mbps, that is faster than has most of competitors. The drive can write 2400 TBW, that is pretty good compared to competitors. When everything is weighed in the balance, our site strongly recommend to purchase Western Digital Black SN850X 2Tb for your PC.

+ Pros

  • Excellent writing speed
  • PCIe 4.0
  • Capacity
  • Endurance

- Cons

  • None

🛒 Buy this or similar SSD Storage:

Samsung 980 Pro 2 Tb

-57% $165
List Price: $379.99

Buy on Amazon

✨ Video Review

WD Black SN850X SSD Review

⁉️ FAQ

The Western Digital Black SN850X has LPDDR4. Dynamic random-access memory (DRAM) in their controller help to improve input/output performance and endurance.

The Western Digital Black SN850X 2Tb due to the high density of memory chips require the installation of additional heat sink. This will reduce temperature of the memory chips and controller. Some motherboards from the factory has additional cooling above and below the SSD to improve performance during high loads.

The Western Digital Black SN850X 2Tb has sequential write speed 6600 Mb/s, maximum read speed 7300 Mb per second. It operate on SanDisk 20-82-20035 controller and M.2 4.0 x 4 interface standard. The NAND memory type is 112L Bics5.
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