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SanDisk · PCIe 5.0 · 4000 GB

WD_BLACK 4TB SN8100

M.2 2280 · TLC NAND · LPDDR4X-4266

Performance
97
Perf / price
22
Capacity value
88
Amazon
$660
WD_BLACK 4TB SN8100
View WD_BLACK 4TB SN8100 Gallery in high resolution
$660
Available on Amazon Updated Aug 29, 2026 Prime FBA
Performance96.7
Performance / price22.0
Capacity value87.9
$660 on Amazon Add this SSD to a build Compare this SSD SSD table

Written analysis

WD_BLACK 4TB SN8100 at a glance

The WD_BLACK 4TB SN8100 is a 4000 GB M.2 2280 SSD using PCIe 5.0 x4, NVMe 2.0. The controller is (SMI) 2508. Flash type is TLC 218-layer. Cache is listed as LPDDR4X-4266.

Rated sequential throughput is 14900 MB/s read and 14000 MB/s write. Random throughput is 2300K read IOPS and 2400K write IOPS. The calculated specification score is 96.7.

Best fit: High-throughput desktop and workstation storage where the platform can use this interface generation.

Endurance and thermals

Rated endurance is 1200 TBW, or approximately 300 TBW per TB of capacity. The listed warranty is 5 years.

Current value

At $660, the drive costs $165.00 per TB. Performance / price is 22.0 and capacity value is 87.9. Compare these values with nearby drives below; interface generation and headline speed alone do not determine value.

Drive data

Full specifications

Interface, flash, controller, cache, throughput, endurance, power, warranty, and value in one technical sheet.

General

Manufacturer
SanDisk
SSD
WD_BLACK 4TB SN8100
Part number
WDS400T1X0M
Model
WDS400T1X0M
Capacity
4000 GB
Form factor
M.2 2280
Launch price
—
Amazon price
$660
Amazon availability
Available
Price updated
Aug 29, 2026

Performance

Sequential read
14900 MB/s
Sequential write
14000 MB/s
Random read
2300K IOPS
Random write
2400K IOPS

Value

Amazon price
$660
Price / TB
$165.00
Performance / price
22.0
Capacity value
87.9

Hardware & cache

Interface
PCIe 5.0 x4, NVMe 2.0
Interface generation
PCIe 5.0
Controller
(SMI) 2508
NAND
TLC 218-layer
Cache type
LPDDR4X-4266
DRAM
LPDDR4X-4266
DRAM capacity
4096 MB
DRAM speed
4266 MT/s
SLC cache
Dynamic and static

Durability & power

Endurance
1200 TBW
Endurance / TB
300 TBW
Warranty
5 years
Idle power
—
Active power
—

Additional information

Also listed as
4TB SN8100
Color
Black

Amazon

Price history

Nearby performance

Similar SSDs

Drives close to WD_BLACK 4TB SN8100 on calculated specification performance. Open the SSD table to sort, filter, and compare side by side.

Compare these in the SSD table

Discussion

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Vendor copy

Amazon listing details

Marketplace feature text kept for reference. Structured specifications above are the source for scores and comparisons.

EXPERIENCE PCIe Gen 5: Drastically enhance your gaming and content creation experience with this PCIe Gen 5.0x4 NVMe M.2 SSD.

BREAKNECK SPEEDS: Your drive reaches sequential read speeds up to an astonishing 14,900MB/s, sequential write speeds up to 14,000MB/s (2TB-4TB model), and over 2,300,000 IOPS (2TB-4TB Models) of random performance.

AN INDUSTRY-LEADER IN POWER EFFICIENCY: Enjoy over 100% more power efficiency (1TB – 4TB models) than our PCIe Gen4 drive at an average operating power of 7.5W or under. Experience astonishing speeds without any added stress to your system.

SPEED MEETS RELIABILITY: Reach heightened speed and reliability with up to 4,800 TBW (8TB model) endurance and our latest TLC 3D CBA NAND technology.

ROOM FOR REVOLUTION: Hold your biggest projects and still have room for OS updates, models for AI-powered applications, and your game library thanks to immense capacities up to 8TB. SANDISK SOFTWARE: Help maximize your drive’s performance, monitor its health and keep it up to date with SANDISK Dashboard (Windows only). Plus, effortlessly migrate your data with Acronis True Image for Sandisk.

POWERED BY SANDISK: The WD_BLACK, WD Blue, and WD Green flash products are manufactured by Sandisk Technologies, Inc. or its affiliates and distributed under license from Western Digital Corporation.

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