WD_Black SN8100 PCIe 5.0 NVMe SSD 4TB
- Digital Storage Capacity: 4 TB
- HardDrive Size: 4 TB
- Connectivity Technology: NVMe, PCIe Gen5
- Hard Disk Interface: PCIE X 4
Last refreshed Sep 9, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A genuinely fast Gen 5 drive for a PCIe 5.0 system with heavy storage needs, though check whether the newer replacement model is now the better buy at a similar price.
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ASIN: B0F3B6MZM9Model: WDS400T1X0MCategory: Internal Solid State Drives
Overview
Built for PCIe 5.0 motherboards, this 4TB M.2 2280 NVMe SSD is rated for sequential read speeds up to 14,900MB/s, aimed at gaming rigs and workstations that can use a Gen 5 slot. In an older Gen 3 or Gen 4 slot it still works, just capped lower.
This drive sits at the high end of consumer storage, built for people already running a PCIe 5.0 motherboard rather than as a general upgrade for an older PC. The manufacturer's own listing flags this as a prior-generation model now superseded by a newer Optimus-branded Gen 5 drive, so check current availability and pricing against that successor before buying.
- PCIe 5.0 x4 interface in the M.2 2280 form factor
- Up to 14,900MB/s sequential read
- TLC 3D NAND for endurance under heavy write loads
- Dashboard software for health monitoring on Windows
Who it's for
Suits a gaming or workstation build with a PCIe 5.0 M.2 slot and a real need for very high sequential speed, such as large game libraries, 4K or 8K video editing, or local AI model storage. Not worth the premium for a system stuck on PCIe 3.0 or 4.0, where the extra bandwidth goes unused.
Pros and cons
- Very high sequential speed on a true PCIe 5.0 slot
- 4TB capacity for large game or media libraries
- M.2 2280 form factor fits standard motherboard slots
- Rated speeds only apply on PCIe 5.0 hardware
- Listed by the manufacturer as replaced by a newer generation model
- High-end pricing versus mainstream PCIe 4.0 drives
Performance notes
Rated sequential read speed reaches up to 14,900MB/s and write up to 11,000MB/s on the PCIe 5.0 x4 interface, figures that only apply when installed in a motherboard slot and BIOS that actually run Gen 5. TLC 3D NAND and an M.2 2280 form factor keep it compatible with standard desktop and high-end laptop slots, and average operating power sits around 7.5W, meant to keep thermals manageable under sustained transfers.
Specifications
| Brand | WD_Black |
|---|---|
| Model | WDS400T1X0M |
| Dimensions & fit | |
| HardDrive Size | 4 TB |
| Item Weight | 0.02 pounds |
| Capacity & performance | |
| Digital Storage Capacity | 4 TB |
| Construction & materials | |
| Enclosure Material | Information Not Available |
| Color | Black |
| Compatibility & installation | |
| Connectivity Technology | NVMe, PCIe Gen5 |
| Hard Disk Interface | PCIE X 4 |
| Hardware Connectivity | PCIE X 4 |
| Compatible Devices | Desktop, Laptop |
| Included components | |
| Customer Package Type | Standard Packaging |
| Unit Count | 1 |
| Warranty & support | |
| Warranty Description | 5 years |
| Other details | |
| Form Factor | M.2 2280 |
| Hard Disk Form Factor | 0.9 inches |
| Data Transfer Rate | 14900 MB/s |
| Hardware Platform | PC |
| Hard Disk Description | Solid State Drive |
| Number of Items | 1 |
| Specific Uses For Product | Gaming, Multimedia, Personal |
| Mfr Part Number | WDS400T1X0M |
| BuiltIn Media | WD_BLACK SN8100 NVMe SSD, Warranty Guide |
Closest rivals on specs
Samsung 9100 PRO PCIe 5.0 NVMe SSD 2TB- Digital Storage Capacity 4 vs 2 TB (+100%)
- HardDrive Size 4 vs 2 TB (+100%)
Samsung 990 PRO NVMe SSD 2TB- Data Transfer Rate 14900 vs 7450 MB/s (+100%)
- Digital Storage Capacity 4 vs 2 TB (+100%)
- HardDrive Size 4 vs 2 TB (+100%)
KingSpec SATA Internal SSD 1TB- Digital Storage Capacity 4 vs 1 TB (+300%)
- HardDrive Size 4 vs 1 TB (+300%)
- Item Weight 0.02 vs 0.07 pounds (-71%)
Frequently asked questions
Do I need a special motherboard for the WD_Black SN8100?
To reach its rated speeds you need a PCIe 5.0 M.2 slot; it will still work in a PCIe 3.0 or 4.0 slot but run at that slot's lower speed limit.
What form factor is this drive?
It is a standard M.2 2280 NVMe SSD, the same physical size used by most PCIe 3.0 and 4.0 drives.
Has this drive been discontinued?
The manufacturer's own listing notes it has been replaced by a newer generation model, so it is worth comparing current pricing against that successor.