WD_Black SN7100 4TB NVMe SSD - Gen4 PCIe, M.2 2280, Up to 7,000 MB/s Read Speed, Up to 6,700 MB/s Write Speed, Next Gen TLC 3D NAND, for Laptops, Handheld Gaming Devices - WDS400T4X0E
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AI Verdict
This 4TB Gen4 PCIe NVMe SSD with 7,000 MB/s read and 6,700 MB/s write is for gamers needing high-capacity, power-efficient storage in laptops or handhelds.
This drive is a strong fit for gamers and power users needing significant storage and high-speed performance in a compact M.2 2280 form factor. Its 4TB capacity and 7,000 MB/s read speeds directly address the needs of large game libraries and quick load times, especially in laptops and handhelds.
If you need the absolute peak Gen4 speeds, look for drives specifically advertising 7,250 MB/s or higher for all capacities, or consider models with a DRAM cache for more consistent sustained performance.
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Pros
- Offers a substantial 4TB capacity for extensive game libraries and media storage.
- Delivers sequential read speeds up to 7,000 MB/s and write speeds up to 6,700 MB/s for fast loading.
- Features a compact M.2 2280 form factor, making it suitable for laptops and handheld gaming devices.
- Built with TLC 3D NAND and a PCIe Gen4 interface for modern system compatibility.
- Provides up to 2,400 TBW endurance for the 4TB model, indicating long-term durability.
- Engineered for improved power efficiency, beneficial for mobile gaming devices.
Cons
- The 4TB model's advertised peak speeds (7,000 MB/s read, 6,700 MB/s write) are slightly lower than the 1-2TB models (7,250 MB/s read, 6,900 MB/s write).
- Users report the drive can run warm, which might be a concern in devices with limited cooling.
- The WD_BLACK Dashboard software for drive optimization is only available for Windows.
- Some users noted needing Windows for BIOS updates, which could be inconvenient for non-Windows users.
- It's a DRAM-less drive, which can sometimes impact sustained performance compared to drives with DRAM cache.
Dimension Scores
With 7,000 MB/s read and 6,700 MB/s write, it's significantly faster than Gen3 drives and near the top tier of Gen4, though slightly below the absolute fastest Gen4 drives.
The 4TB model boasts a high 2,400 TBW endurance rating and a 5-year limited warranty, indicating strong long-term reliability.
A 4TB capacity is exceptionally large for an internal NVMe SSD, providing ample space for extensive game libraries, large applications, and media.
Its M.2 2280 form factor and PCIe Gen4 x4 interface make it widely compatible with modern laptops, handheld gaming devices, and desktops.
Best For
- Upgrading storage in a PCIe Gen4 compatible gaming laptop.
- Expanding capacity in a compatible handheld gaming console like the Steam Deck or ROG Ally.
- Users who frequently transfer large game files, 4K video, or other demanding content.
- Content creators needing fast internal storage for game development or high-bitrate streaming captures.
Not Recommended For
- Budget-focused users who don't require Gen4 speeds or 4TB capacity.
- Systems limited to PCIe Gen3, as they won't utilize the full speed potential.
- Users who prioritize the absolute fastest Gen4 speeds available, as some smaller capacities or other drives offer slightly higher peaks.
Watch Out For
- The 4TB model doesn't hit the same peak 7,250 MB/s read and 6,900 MB/s write speeds advertised for the 1-2TB versions, instead topping out at 7,000 MB/s read and 6,700 MB/s write.
- Expect it to run pretty warm under heavy load; one user mentioned it 'Runs pretty warm'.
- If you're not on Windows, you might struggle with firmware updates, as a user reported 'Needs windows for BIOS updates'.
- Despite being designed for mobile devices, its DRAM-less architecture could mean less consistent performance during prolonged, intensive write operations compared to drives with DRAM.
Full Specifications
| ASIN | B0DZK9C789 |
| Brand | Sandisk |
| Color | Black |
| Series | WD_BLACK SN7100 NVMe SSD |
| Hard Drive | 4 TB Solid State Drive |
| Item Weight | 0.192 ounces |
| Manufacturer | Sandisk Technologies, Inc. |
| Special Feature | PCIe Gen4 NVMe |
| Flash Memory Size | 4 TB |
| Hardware Platform | PC |
| Installation Type | Internal Hard Drive |
| Item model number | WDS400T4X0E-00CJA0 |
| Compatible Devices | Desktop, Handheld Gaming Console, Laptop |
| Product Dimensions | 3.14 x 0.86 x 0.04 inches |
| Hard Disk Interface | PCIE x 4 |
| Hard Drive Interface | PCIE x 4 |
| Hard Disk Description | Solid State Drive |
| Hard Disk Form Factor | 22 Millimeters |
| Item Dimensions LxWxH | 3.14 x 0.86 x 0.04 inches |
| Connectivity Technology | PCIe Gen4 NVMe |
| Digital Storage Capacity | 4 TB |
What Buyers Say
What's really interesting is how many users highlight this drive as a 'Goldilocks' option—not the absolute fastest or cheapest, but a balanced choice that runs efficiently and cool enough for mobile devices. People are stoked about the huge 4TB capacity, letting them dump tons of games on it without thinking twice. However, a few folks noted it can get pretty warm, and the advertised speeds for this 4TB model are a hair slower than the smaller 1-2TB versions. The Windows-only dashboard and BIOS updates are a minor annoyance for some.
“Dude, I just needed a huge drive for my Steam Deck and this thing just works, but man, it gets a little toasty when I'm really pushing it.”
Common Praise
- Provides blazing fast speeds for game loading and file transfers.
- Offers massive storage capacity at 4TB, perfect for large game collections.
- Works 'plug and go' without complicated setup.
- Cools down quickly after intense use, even without a heatsink.
- Optimized for power efficiency, making it suitable for laptops and handhelds.
Common Complaints
- The 4TB version has slightly lower peak speeds than the 1-2TB models.
- Can run pretty warm under heavy workloads.
- The WD_BLACK Dashboard software is only available for Windows.
- Requires a Windows environment for BIOS updates.
- Lacks a bundled heatsink, which might be needed for some applications or devices.
Ownership Tips
- Even without a heatsink, it cools down quickly after stress tests.
- It's genuinely a 'plug and go' experience, no fuss.
- The drive supports 4kn sectors, which is a plus for some advanced users.
- The power efficiency is noticeable, especially in battery-powered devices.
- The speed difference between the 4TB and smaller capacities isn't usually noticeable in real-world gaming.
Frequently Asked Questions
Is the WD_BLACK SN7100 4TB compatible with the PlayStation 5?
While it's a PCIe Gen4 NVMe SSD, the PS5 typically requires a heatsink for optimal performance and to meet Sony's specifications. This drive does not include a heatsink.
Does this SSD come with a heatsink?
No, the WD_BLACK SN7100 4TB does not come with an integrated heatsink. You would need to purchase and install one separately if your device requires it or for better thermal management.
What are the actual read and write speeds for the 4TB model?
The 4TB model is specified to deliver sequential read speeds of up to 7,000 MB/s and sequential write speeds of up to 6,700 MB/s.
Can I use this SSD in a desktop PC?
Yes, this drive is compatible with desktop PCs that have an M.2 2280 slot and support PCIe Gen4.
Is the WD_BLACK Dashboard software necessary?
The WD_BLACK Dashboard is optional software that helps optimize drive performance and monitor health, but the drive will function without it. It's only available for Windows.
Buying Guide
When you're looking at an NVMe SSD like this, you're basically buying speed and space for your computer or gaming device. You want to make sure your system actually supports the PCIe Gen4 interface to get those advertised 7,000 MB/s speeds; otherwise, you're leaving performance on the table. Also, consider the M.2 2280 size to ensure it physically fits in your device. For gaming, a larger capacity like 4TB means you won't be constantly uninstalling games to make room for new ones.
PCIe Gen4 x4
M.2 2280
7,000 MB/s Read / 6,700 MB/s Write
2,400 TBW Endurance
Alternatives
If this drive doesn't quite fit, look for a PCIe Gen5 NVMe SSD for even faster speeds, or a Gen3 drive if your system is older and you want to save some cash. If 4TB is overkill, consider a 1TB or 2TB Gen4 NVMe SSD with similar read/write speeds.
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