Western Digital Black SN850X
B High-end PCIe 4.0 x4 M.2 1TB, 2TB, 4TB, 8TB
The Western Digital Black SN850X is a high-end PCIe 4.0 x4 drive, with a DRAM cache, offered in 1TB, 2TB, 4TB, 8TB.
Black SN850X SSD specifications
This Western Digital Black SN850X SSD spec sheet covers rated SSD speed, DRAM cache, TLC NAND type, controller. Values are shown only where they are recorded in the source data.
InterfacePCIe 4.0 x4
Form factorM.2
ControllerWD 20-82-20035-B2, WD 20-82-000292-B2
NANDTLC, 112L
CacheDRAM
Max sequential7300 / 6600 MB/s
Capacities & rated speed
| Capacity | Read MB/s | Write MB/s |
|---|---|---|
| 1TB | 7300 | 6600 |
| 2TB | 7300 | 6600 |
| 4TB | 7300 | 6600 |
| 8TB | 7300 | 6600 |
Endurance (TBW/DWPD) for this drive is not recorded in our source data.