1TB WD Black SN7100 M.2 PCIe 4.0 NVMe SSD [7250MB/s R, 6900MB/s W]

WD Black SN7100 1TB NVMe PCIe Gen4 M.2 SSD

The WD Black SN7100 1TB is a high-performance PCIe Gen 4 NVMe M.2 SSD delivering sequential read speeds of up to 7,250MB/s — near the Gen 4 interface limit — with outstanding power efficiency and strong reliability credentials.

The WD Black SN7100 1TB NVMe SSD is built around WD’s next-generation TLC 3D NAND and the SanDisk Polaris 3 controller, delivering sequential read speeds of up to 7,250MB/s and sequential write speeds of up to 6,900MB/s in the standard M.2 2280 form factor. This places the SN7100 among the fastest PCIe Gen 4 drives available and comfortably within reach of the interface ceiling, making it an excellent choice for desktop and laptop upgrades, new system builds, gaming handhelds, and professional workstation storage.

Near Gen 4 Interface Speeds — Without the Premium Price

Sequential read performance of 7,250MB/s and sequential write performance of 6,900MB/s place the SN7100 1TB in a very small group of PCIe Gen 4 drives that genuinely approach the theoretical bandwidth ceiling of the interface. Most drives at this speed point carry a DRAM cache chip that adds to cost and power draw. The SN7100 achieves near-identical sequential performance without dedicated DRAM by using Host Memory Buffer (HMB) technology, which allocates a small portion of the system’s main memory as a mapping cache — a mature and effective approach that keeps costs and power consumption lower while maintaining headline speeds in typical workloads. In independent testing by PCWorld, the SN7100 2TB was called “the fastest PCIe 4.0 host memory buffer design SSD we’ve put through the wringer so far.”

Industry-Leading Power Efficiency

The SN7100 delivers up to 729MB/s per watt during file transfers — a substantially higher efficiency figure than competing drives including the Samsung 990 EVO Plus (524MB/s per watt) and the WD Black SN850X (449MB/s per watt). This makes the SN7100 particularly well suited to laptops, gaming handhelds and compact builds where thermal headroom and battery life are important considerations, without sacrificing the performance needed for demanding desktop and workstation use.

Built for Gaming, Creative and Professional Workloads

The SN7100 1TB handles fast game loading, OS boot, application launch and project file access reliably at PCIe Gen 4 speeds. For creative professionals, the combination of high sequential read and write performance makes it well suited as a primary OS and applications drive, a media cache drive in video editing workflows, or a project scratch disk in Photoshop, Lightroom and DaVinci Resolve setups. In AI and development workloads it handles dataset access and model loading effectively at its speed tier. Random read performance reaches up to 1,000,000 IOPS and random write performance up to 1,400,000 IOPS, supporting consistent responsiveness across multi-threaded workloads.

Compatibility

The WD Black SN7100 is compatible with any desktop, laptop or device featuring an M.2 2280 slot with PCIe Gen 4 x4 or PCIe Gen 3 x4 support. It is backward compatible with PCIe Gen 3, Gen 2 and Gen 1 interfaces at reduced speeds. It is also compatible with Sony PlayStation 5 M.2 expansion slots. The WD_BLACK Dashboard application (Windows only) provides health monitoring, performance optimisation and firmware update management.

Ideal for

• Desktop and laptop PC upgrades requiring maximum Gen 4 performance
• New system builds where fast primary storage is a priority
• Gaming PCs and gaming handhelds requiring fast load times
• Video editing media cache and timeline scratch drives
• Photoshop and Lightroom scratch disk and catalogue storage
• AI application and model storage
• Sony PlayStation 5 M.2 storage expansion
• Compact and laptop builds where power efficiency matters

The WD Black SN7100 1TB NVMe PCIe Gen4 M.2 SSD delivers a combination of near-interface-limit sequential performance, class-leading power efficiency and strong long-term reliability backed by a five-year warranty — making it one of the most well-rounded PCIe Gen 4 drives available at its price point.

Full Specification

FAQ

What is the difference between the WD Black SN7100 and WD Black SN850X?
The SN850X is a premium DRAM-equipped PCIe Gen 4 drive designed for demanding desktop workloads, with slightly higher random performance and better sustained write consistency under heavy continuous workloads. The SN7100 is a DRAM-less PCIe Gen 4 drive that delivers near-identical sequential read and write speeds to the SN850X at lower cost and significantly better power efficiency, making it the better choice for laptops, handhelds and compact builds, and an excellent value option for desktop use where sequential throughput is the priority.

Is the WD Black SN7100 compatible with the PlayStation 5?
Yes. The SN7100 is fully compatible with the PlayStation 5 M.2 NVMe storage expansion slot. It meets Sony’s minimum read speed requirements and its M.2 2280 form factor is directly supported. A heatsink is recommended for PS5 installation to maintain thermal performance.

Does the WD Black SN7100 need a heatsink?
A heatsink is not required for standard desktop or laptop use and the drive operates within normal thermal limits without one. For PlayStation 5 installation Sony recommends a heatsink, and in very thermally constrained environments a low-profile M.2 heatsink can be beneficial. The drive’s power efficiency means it runs cooler than many competing Gen 4 drives.

What is Host Memory Buffer (HMB) and does it affect performance?
Host Memory Buffer is a technology that allows a DRAM-less SSD to use a small reserved portion of the system’s main RAM as a mapping cache, rather than carrying a dedicated DRAM chip on the drive itself. In typical sequential and mixed workloads this approach delivers performance comparable to DRAM-equipped drives. The main advantage over DRAM is lower cost, lower power consumption and lower heat output. For the vast majority of gaming, creative and professional workloads the practical difference is negligible.

Is the WD Black SN7100 suitable for video editing?
Yes, as a primary OS and applications drive or as a media cache and scratch disk. Sequential read speeds of 7,250MB/s and write speeds of 6,900MB/s are sufficient for 4K and multi-stream video editing workflows in Premiere Pro, DaVinci Resolve and Final Cut Pro. For the most demanding 6K or 8K RAW multi-stream workflows a PCIe Gen 5 drive offers higher sustained throughput, but for the majority of professional video editing tasks the SN7100 performs strongly and reliably.