WD_Black SN8100 PCIe 5.0 NVMe SSD 4TB
- 4 TB capacity, M.2 2280 form factor
- PCIe Gen 5 x4, NVMe interface
- Up to 14,900 MB/s read, 11,000 MB/s write
- 14,000 MB/s media speed
- Desktop and laptop compatible
- TLC 3D NAND, low power profile
- 7.5 g weight, 22 millimeter width
- 5 year limited warranty
Last refreshed Sep 9, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A very fast fifth generation PCIe drive for desktops and laptops with a compatible slot. It needs a matching port to reach the top speeds, and the listing shows no heatsink.
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ASIN: B0F3B6MZM9Model: WDS400T1X0MCategory: Internal Solid State Drives
Overview
A fifth generation PCIe link carries data between this drive and the processor over four lanes using the NVMe protocol. The flash is stacked TLC NAND, and the stick fits any slot that takes the common long length.
Gamers, video editors and anyone moving large project files gain the quickest sequential speeds the listing offers, with a low power profile for a drive this fast. Speed is only reached in a slot wired for the newest PCIe generation. A heatsink and a thermal plan are not covered in the listing.
Who it's for
A video editor, game developer or enthusiast building a new desktop on a current platform. A laptop with a compatible slot can use it too. Owners of older systems will see the speed capped by the slot and should not pay for bandwidth they cannot use.
Pros and cons
- Top listed read and write speeds
- Large four terabyte capacity
- Low power profile for its class
- Light plug-in stick
- Needs a Gen 5 slot for full speed
- Heatsink not listed
- Only suits M.2 2280 slots
- Enclosure material not available
Performance notes
Sequential speed is set by the interface: four PCIe lanes of the newest generation give the bandwidth, and the TLC NAND and controller deliver it. In a slot with an older generation the drive still works but runs slower. Sustained heavy writes make the drive hot, so airflow or a motherboard heatsink affects how long it holds peak speed.
Specifications
| Brand | WD_Black |
|---|---|
| Model | WDS400T1X0M |
| Dimensions & fit | |
| Item weight | 7.5 g |
| Capacity & performance | |
| Digital Storage Capacity | 4 TB |
| Media Speed | 14,000 MB/s |
| Read Speed | Up to 14,900 MB/s |
| Write speed | Up to 11,000 MB/s |
| Compatibility & installation | |
| Connectivity Technology | NVMe, PCIe Gen5 |
| Hard Disk Interface | PCIe x4 |
| Compatible Devices | Desktop, laptop |
| Warranty & support | |
| Warranty Description | 5 year limited |
| Other details | |
| Form Factor | M.2 2280 |
| Hard Disk Form Factor | 22 millimeters |
| Specific Uses For Product | Gaming, multimedia, personal |
| BuiltIn Media | SSD and 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
Will the WD_Black SN8100 4TB fit in my laptop?
It is listed for desktops and laptops and uses the M.2 2280 form factor, so check that your laptop slot takes that length.
Does the WD_Black SN8100 work in an older PCIe slot?
The drive uses a PCIe Gen5 x4 interface. The listing gives top speeds only for that interface, so an older slot will not reach them.
Is the WD_Black SN8100 an external drive?
No. It is an internal M.2 NVMe SSD with no enclosure listed.
What comes in the WD_Black SN8100 box?
The listing shows the SSD and a warranty guide.