Western Digital Black SN850X 4Tb NVMe detailed specs
Western Digital's Black SN850X SSD use PCIe M.2 4.0 x 4 expansion standard. Detailed characteristics of this NVMe SSD in our article.
Western Digital's 4Tb Black SN850X NVMe is powered by SanDisk 20-82-20035. The SSD storing a data location map on Dynamic-Random Access Memory LPDDR4 to launch a programs faster. The Black SN850X comes equipped with 112L Bics5 flash memory. Western Digital Black SN850X also available in 2 Tb and 1 Tb capacities.
Performance and benchmarks
SSD use PCIe M.2 4.0 x 4 with maximum write speeds 6600 MB/s, and read speeds 7300 MB/s. This model has IOPS 1200000 on writing and 1200000 on reading operations.
Endurance and warranty
Western Digital provide 5 years warranty for this product that limited by 2400 TBW.
Specs
| Category | Value |
| Capacity | 4 Tb |
| Interface | M.2 4.0 x 4 |
| Controller | SanDisk 20-82-20035 |
| Memory type | 112L Bics5 |
| DRAM | LPDDR4 |
| 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 |
Conclusion
Black SN850X (4Tb) produced by Western Digital use PCIe 4 that is significantly faster than previous bus standard. The maximum write speed is 6600 Mbps, that is faster than has most of rivals. The NVMe provide possibility to write 2400 TBW, that is bad compared to competitors. After evaluating all the facts, we strongly advise to purchase Western Digital Black SN850X 4Tb for your PC.
+ Pros
- Excellent writing speed
- PCIe 4.0
- Capacity
- Cons
- Writing speed
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Video Review
WD Black SN850X SSD Review
