Western Digital WD Black SN7100 1TB

Name: Western Digital WD Black SN7100 1TB
Brand: Western Digital
SKU: 1570

Manufacturer: Western Digital

The Western Digital WD Black SN7100 1TB is a high-throughput M.2 NVMe solid-state drive aimed at users who need consistent storage performance in a compact form factor. Built around the Polaris 3 controller and TLC NAND, it carries a 5-year warranty and operates on the NVMe 1.4 specification over a PCIe Gen 4 interface, making it a capable option for systems that support that standard.

On the performance side, the drive reaches 7250 MB/s sequential read and 6900 MB/s sequential write, while random workloads are handled at up to 1,000,000 read IOPS and 1,400,000 write IOPS. The controller uses 4 channels and relies on HMB (Host Memory Buffer) caching rather than dedicated DRAM. With a TBW rating of 600, a maximum operating temperature of 85 °C, and no integrated heatsink, the drive ships without AES encryption support or RGB lighting.

Pros

Sequential read and write speeds of 7250 MB/s and 6900 MB/s respectively offer substantial throughput for large file operations
Random write performance reaches 1,400,000 IOPS, reflecting strong responsiveness under queue-heavy workloads
A TBW rating of 600 indicates a solid endurance ceiling for sustained everyday use
The 5-year warranty period provides long-term coverage for the drive
Uses the PCIe Gen 4 interface with NVMe 1.4, enabling full use of modern platform bandwidth
The M.2 form factor keeps the drive compact and compatible with a wide range of systems

Cons

Relies on HMB caching rather than dedicated DRAM, which may reduce consistency under sustained mixed workloads
No integrated heatsink included, leaving thermal management dependent on the host system
AES encryption is not supported, making the drive unsuitable for use cases that require hardware-level data security
TLC NAND storage type is less durable per cell than MLC or SLC alternatives
Limited to 4 controller channels, which may constrain parallelism compared to drives with higher channel counts

Who is this for?

This drive is a strong fit for users running PCIe Gen 4 compatible systems who need high sequential throughput for tasks like video editing, large file transfers, or game loading — where the 7250 MB/s read and 6900 MB/s write speeds translate into tangible time savings. The 1,400,000 random write IOPS also make it well-suited for workloads with heavy queue depth, such as content creation pipelines or software development environments with frequent compilation and I/O bursts. With a 600 TBW endurance rating and a 5-year warranty, it suits users who want a reliable primary drive for a long-term build without swapping storage frequently.

Who is this NOT for?

Users who require hardware-level AES encryption — such as those handling sensitive business data or operating in compliance-driven environments — will find this drive unsuitable, as it offers no encryption support. Systems without a PCIe Gen 4 slot will not be able to take full advantage of the drive's bandwidth ceiling, making it a poor fit for older platforms where the interface would bottleneck performance. Additionally, users building in thermally constrained cases without active airflow near the M.2 slot may face challenges, since the drive ships without an integrated heatsink and relies entirely on the host system for thermal management.

Read speed:

sequential read speed	7250 MB/s
random read speed	1000000 IOPS

The WD Black SN7100 1TB delivers a sequential read speed of 7250 MB/s, allowing large files to be transferred at a brisk pace. For workloads involving many small, scattered data requests, the drive reaches a random read speed of 1,000,000 IOPS, reflecting solid throughput for demanding read-intensive tasks.

Write speed:

sequential write speed	6900 MB/s
random write speed	1400000 IOPS

On the write side, the WD Black SN7100 1TB sustains a sequential write speed of 6900 MB/s, making it well-suited for moving large volumes of data onto the drive at pace. When handling fragmented or queue-heavy operations, it reaches a random write speed of 1,400,000 IOPS, indicating strong responsiveness under mixed write workloads.

Benchmarks:

General info:

type	M2
SSD cache	HMB (Host Memory Buffer)
Is an NVMe SSD	✓
NVMe version	1.4
internal storage	1000GB
controller	Polaris 3 A101-000172-A1
SSD storage type	TLC
PCI Express (PCIe) version	4
Controller channels	4
Terabytes Written (TBW)	600
warranty period	5 years
Has an integrated heatsink	✕
maximum operating temperature	85 °C
bits of encryption supported	0
has RGB lighting	✕

The WD Black SN7100 1TB is an M.2 NVMe SSD running on NVMe version 1.4 over a PCIe Gen 4 interface, with 1000GB of TLC NAND storage managed by a Polaris 3 A101-000172-A1 controller operating across 4 channels. It uses HMB (Host Memory Buffer) caching in place of dedicated DRAM, and carries a TBW rating of 600 alongside a 5-year warranty. The drive has a maximum operating temperature of 85 °C and does not include an integrated heatsink, AES encryption, or RGB lighting.

Final Verdict

The Western Digital WD Black SN7100 1TB positions itself as a capable M.2 NVMe drive for users on modern PCIe Gen 4 platforms who prioritize throughput and sustained endurance. Its 7250 MB/s sequential read speed and 1,400,000 random write IOPS make it a practical choice for content creators, developers, and general power users who regularly push storage with large or queue-intensive workloads. The absence of hardware encryption and a dedicated heatsink do narrow its appeal for specialized or thermally sensitive deployments, but for a broad range of everyday high-performance use cases, the drive's 600 TBW rating and five-year warranty reinforce it as a reliable long-term storage solution worth serious consideration.