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The WD Blue SN5100 is a PCIe Gen 4 NVMe M.2 SSD built for everyday desktop and laptop storage. The 4TB model reads at up to 7,300 MB/s, which puts it near the top of Gen 4 drives and well ahead of older Gen 3 SSDs. It is a DRAM-less design that leans on HMB and SLC caching, so it suits game libraries, large photo and video files, and general system use rather than sustained heavy writes. Against Samsung's 990 Pro and WD's own Black SN850X it gives up some peak write speed and endurance, but it runs cooler and simpler in thin laptops and mainstream builds.
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Lowest price we've seen: $623.99 on Nov 10 at Best Buy. Tracked across 2 stores since Nov 10.
Owners and reviewers treat the SN5100 as a solid mainstream Gen 4 drive: fast reads, low heat and easy setup. Criticism centers on its DRAM-less design, which shows in large file transfers and heavy write workloads.
