Western Digital WD Blue SN5100

The WD Blue SN5100 is a fast, easy-to-install 1TB Gen 4 SSD with strong user reviews. Speed is its best asset, landing near the top of our charts. It's worth buying if you find it under USD 180, but the 3-year warranty and already-replaced status are real caveats.

Sequential reads at 7,100 MB/s and writes at 6,700 MB/s put this drive in strong territory, around the 84th percentile for speed in our database. Random performance is solid too, with 1,000K read IOPS and 1,300K write IOPS. The DRAM-less design doesn't seem to hurt much in real-world use, and several owners mention it works fine even in a PCIe 5.0 slot. Endurance is decent at 600 TBW, which is above average but not class-leading. The weakest spot is portability, which scored a rough 21.5 out of 100. This is an internal M.2 drive, so that's not a shock, but if you want something to toss in a bag, this isn't it.

Against the Samsung 9100 PRO, the SN5100 gives up some peak performance and endurance, but it costs less. The Micron T710 and Crucial T710 are closer rivals, with similar Gen 4 speeds and better warranty coverage in some cases. The Lexar NM1090 PRO and ADATA GAMMIX S70 Blade are also in the mix, often with more aggressive pricing. The SN5100's real edge is its user sentiment, people genuinely like this drive. But if you want the latest and greatest, the Samsung or Micron options are worth a look.

Pricing is all over the place. In the US, you'll see USD 172 to USD 190 across three listings. In Canada, it runs CAD 250 to CAD 285. That's a meaningful spread, so shop around. The cheapest US listing is the one to grab if you're stateside. For the speed and endurance you get, the lower end of that range feels fair. At the top end, you're paying too much for a drive that's already been replaced in the product line.

The WD Blue SN5100 is a 1TB PCIe 4.0 drive that hits 7,100 MB/s reads and 6,700 MB/s writes. That's fast enough for most people, and it lands in the top tier of our database for speed. It's DRAM-less, but the TLC NAND and nCache 4.0 keep things moving. For a laptop or desktop upgrade, this is a straightforward pick.

One odd thing: WD's own page says this product has been replaced by the SanDisk Optimus 5100. That doesn't make the SN5100 bad, but it's worth knowing you're buying a drive that's already being sunset. The 3-year warranty listed here also conflicts with the 5-year warranty mentioned in the marketing copy. We'd double-check before you buy.

Skip this if you need a drive for heavy sustained writes, like constant video editing or database work. The DRAM-less design and 600 TBW endurance will hold you back. Also skip it if you want the longest possible warranty, 3 years is short for an SSD. And if you're buying for a portable enclosure, look elsewhere, this thing scored 21.5 out of 100 for portability.

If you need a fast, reliable 1TB NVMe drive for a laptop or desktop and you find it at the low end of the price range, buy it. It's a solid performer with happy owners. Just don't expect cutting-edge endurance or a long warranty. And if you're the type who wants the newest thing, WD already has a replacement waiting.