This article covers Western Digital SN7100 1 TB 2 TB.
Overview
The Western Digital SN7100 is a PCIe 4.0 x4 NVMe M.2 SSD launched in November 2024, available in 1TB and 2TB capacities. It uses 3D TLC NAND flash and the in-house Polaris 3 controller, with a DRAM-less design that leverages Host Memory Buffer (HMB) to allocate 64MB of cache from system memory. Positioned as a mid-range storage solution for gaming PCs and creative workstations, the SN7100 delivers significantly improved sequential read and write speeds over its predecessor, the SN580. It excels at reducing game load times and handling large file transfers, making it a solid choice for users who want PCIe 4.0 performance without breaking the bank. Pricing for the 1TB model sits around ¥34,000 (as of September 2026), placing it in the competitive mid-range segment. The combination of HMB-based caching and TLC NAND offers a practical balance of speed and cost, appealing to gamers and content creators alike.
Compatibility Guide
Form factor: M.2 2280 (80mm length, 22mm width). Compatible with most desktop motherboards and many laptops that have an M.2 slot. Interface: PCIe 4.0 x4, NVMe 1.4. Backward compatible with PCIe 3.0 slots, but performance will be limited to PCIe 3.0 x4 speeds. Storage interface: NVMe only. Not compatible with SATA or M.2 SATA slots. OS support: Windows 10/11, macOS, Linux, and any OS with native NVMe driver support. * Note for PS5: The SN7100 can be used as internal storage expansion, but a heatsink must be installed separately as the drive does not come with one. Ensure the PS5 firmware is updated.
Product Info
Release date: November 2024 Capacities: 1TB / 2TB Interface: PCIe 4.0 x4, NVMe 1.4 Form factor: M.2 2280 NAND: 3D TLC NAND Controller: Western Digital Polaris 3 DRAM: None (HMB 64MB) Warranty: 5 years (manufacturer) * Retail channels: Major electronics retailers, online stores (, Yahoo! Shopping, etc.) Market positioning: Mid-range. The DRAM-less design with HMB delivers strong random performance at a competitive price, making it ideal for gaming and everyday creative tasks.
Best Use Cases
Gaming PC builders: Gamers who want fast load times for AAA titles. The SN7100's high sequential read speeds reduce level loading, and it benefits from DirectStorage on supported games. Requires a PCIe 4.0 motherboard for full performance. Content creators (photo/video): Users who frequently work with large RAW files or 4K video. TLC NAND and HMB provide stable transfer speeds. For professionals handling massive datasets daily, a DRAM-equipped drive like the SN850X is recommended. Laptop storage upgrades: Owners of laptops with an M.2 2280 slot who want faster boot and application loading. Low power consumption and heat output help preserve battery life. Verify the laptop's M.2 slot supports PCIe 4.0. Budget-conscious performance seekers: Users who want PCIe 4.0 speeds without paying a premium for DRAM. The SN7100 offers near-DRAM performance in most real-world scenarios at a lower price.
Things to Consider
The DRAM-less design may lag behind DRAM-equipped drives in heavy random write workloads (e.g., database servers, VMs). For typical gaming and office use, the difference is negligible. Full PCIe 4.0 performance requires a compatible motherboard. On PCIe 3.0 systems, speeds drop by roughly half, so check your platform before upgrading. No included heatsink. Under sustained heavy loads, temperatures can rise; adding an aftermarket M.2 heatsink is advisable for long gaming sessions or benchmarks. Competitors include Samsung 990 EVO Plus and Crucial T500. The SN7100 offers a better price-to-performance ratio, but if you need DRAM, consider the SN850X or 990 Pro. ## FAQ
Q: Can I use the SN7100 in a PS5? A: Yes, the PS5 supports PCIe 4.0 x4 NVMe M.2 SSDs. However, the SN7100 does not include a heatsink, so you must install a compatible third-party heatsink that fits the PS5's expansion slot. Also ensure the PS5 firmware is up to date. Q: Is the 2TB model faster than the 1TB model? A: Sequential speeds are essentially identical. The 2TB model may have slightly better random performance due to increased NAND parallelism, and it offers higher total write endurance (TBW). Q: Does the lack of DRAM affect everyday performance? A: For gaming, web browsing, and office work, you won't notice a difference from DRAM-equipped SSDs. HMB uses system memory as cache effectively. Only in extreme multi-tasking with massive file copies might a DRAM drive pull ahead.
