Western Digital WD_BLACK SN850X NVMe SSD (M.2 2280)
Capacity
Price
$369.95
Per TB$184.98
Buy on AmazonAlso available at
Reasons to buy
- PCIe Gen4 NVMe performance with Western Digital-rated sequential reads up to 7,300 MB/s on 1TB through 4TB models.
- Capacity ladder from 1TB to 8TB for large Steam, Xbox PC, or creative libraries without juggling multiple drives.
- Published endurance up to 4,800 TBW on the 8TB SKU, strong for a client gaming SSD family.
- Optional heatsink SKUs and Game Mode 2.0 in WD_BLACK Dashboard for tuned gaming hosts on Windows.
- Five-year limited warranty with TBW limits spelled out in Western Digital consumer documentation.
Reasons to avoid
- Premium cost per terabyte versus budget PCIe Gen4 drives that skip DRAM and advanced firmware.
- Peak speeds require a Gen4-capable M.2 slot; Gen3-only boards leave performance on the table.
- Bare 2X0E models need your own cooling plan in hot laptops or cramped ITX builds.
- 8TB pricing stays high compared with pairing a smaller boot SSD with a hard drive archive.
Specifications
- endurance tbw
- 1200
Researched and maintained by Hard Drive Prices Editorial Team. · Updated June 5, 2026
Specifications
- endurance tbw
- 1200
Researched and maintained by Hard Drive Prices Editorial Team. · Updated June 5, 2026
User ratings
- Best Buy4.9(687)
- Amazon4.8(17,385)
What you're getting
The WD_BLACK SN850X is a PCIe Gen4 x4 NVMe solid-state drive in the M.2 2280 form factor, aimed at gaming PCs and creative workstations that need fast game and project loads. Western Digital and SanDisk publish sequential read speeds up to 7,300 MB/s on most capacities in this line, with write peaks that step up on larger SKUs.
Retail models ship either bare (suffix 2X0E) or with an optional factory heatsink (suffix 2XHE) on capacities where Western Digital offers both. The family spans 1TB through 8TB on TLC 3D NAND, and the downloadable WD_BLACK Dashboard on Windows adds health monitoring plus Game Mode 2.0 features such as predictive loading on supported hosts.
Endurance is rated in terabytes written (TBW) and scales with capacity: Western Digital lists 600 TBW at 1TB, 1,200 TBW at 2TB, 2,400 TBW at 4TB, and 4,800 TBW at 8TB in its published specification tables. Warranty coverage is typically five years or until the TBW limit is reached, whichever comes first, with regional terms on Western Digital support.
Host compatibility still matters. You need a motherboard M.2 slot that routes PCIe Gen4 x4 NVMe lanes to realize peak throughput, though the drive remains backward compatible with slower PCIe generations at reduced speed. Confirm clearance if you add a third-party heatsink, and verify the live cart price before purchase because SSD street pricing moves quickly.
Buying context
Typical value (not live pricing)
Per-terabyte cost drops as you move from 1TB toward 4TB and 8TB, but the largest SKUs still carry a steep absolute price. Amazon and major retailers frequently run sales that undercut list MSRP, so treat any snapshot here as a starting point and confirm checkout pricing for the exact model suffix (bare vs heatsink) before you buy.
Where this line often shows up
- Primary game libraries on Windows 11 desktops with a PCIe Gen4 M.2 slot.
- 4K video editing scratch disks when paired with slower bulk HDD or NAS archives.
- Compact ITX builds that can fit a bare 2280 module with a motherboard-supplied heatsink.
- Workstations running Unreal Engine or DaVinci Resolve projects that benefit from low-latency storage.
- Upgraders stepping up from SATA SSDs or first-gen PCIe Gen3 NVMe boot drives.
Features
PCIe Gen4 x4 NVMe: M.2 2280 drive on PCIe 4.0 x4 with backward compatibility to earlier PCIe generations at lower throughput.
Speed tiers by capacity: Up to 7,300 MB/s sequential read on 1TB through 4TB models; 8TB lists up to 7,200 MB/s read in Western Digital tables.
Write bandwidth steps: 1TB peaks at 6,300 MB/s sequential write; 2TB, 4TB, and 8TB list up to 6,600 MB/s in vendor specs.
TLC 3D NAND: Built on SanDisk TLC 3D NAND with published random IOPS up to 1.2M read on higher capacities.
WD_BLACK Dashboard: Windows utility for health stats, RGB on heatsink SKUs, and Game Mode 2.0 load prediction.
Heatsink options: Factory heatsink variants (2XHE) available on capacities Western Digital documents for thermally constrained installs.