SanDisk WD Blue SN5100 500GB PCIe 4.0 x4 NVMe M.2 2280

The WD Blue SN5100 is a fast budget PCIe 4.0 drive with a strong random read score, but QLC NAND and no DRAM cache hold it back under sustained loads. The 500GB capacity is small, and pricing varies widely, so shop carefully. It's a decent boot drive if you find it cheap, but most people should spend a bit more on a 1TB TLC drive.

Sequential speeds are the headline here. 6600 MB/s read and 5600 MB/s write put this drive well above average for PCIe 4.0, and the random read score lands in the 92nd percentile in our database. That's genuinely impressive for a DRAM-less QLC drive. Random write IOPS are rated at 1.1M, which is strong on paper. But QLC NAND without a DRAM cache means sustained writes can slow down once the SLC cache fills up. For everyday tasks, booting Windows, loading games, and copying moderate files, you probably won't notice. For heavy video editing or constant large file transfers, you will.

Against the Samsung 990 PRO or Crucial T500, the SN5100 gets smoked in sustained performance and feature set. Those drives have DRAM caches, TLC NAND, and much stronger endurance ratings. The MSI SPATIUM M480 PRO and XPG GAMMIX S70 Blade also offer more capacity for the money in many markets. The Corsair MP700 Elite is a Gen 5 drive, so it's in a different league entirely. The SN5100's only real advantage is price, and even that depends on which listing you find.

Pricing is all over the place right now. US listings range from USD 119 to USD 150, and Canadian listings span CAD 148 to CAD 185. That's a meaningful spread for a 500GB drive. If you can grab it near the low end, it's a decent value. At the high end, you're dangerously close to better drives with more capacity. Shop around before you buy, and don't pay a premium for a budget drive.

The WD Blue SN5100 is SanDisk's budget-friendly PCIe 4.0 drive, and on paper it looks like a solid deal. You get 6600 MB/s reads and 5600 MB/s writes, which is plenty fast for most people. It's QLC NAND and DRAM-less though, so don't expect it to hang with premium drives under heavy sustained loads.

For a 500GB boot drive or a cheap upgrade for an older laptop, it's a reasonable pick. The 5-year warranty and 300 TBW endurance rating are better than we expected from a budget QLC drive. But the 500GB capacity is small by today's standards, and the customer review pool is tiny, so we're working with limited real-world feedback.

Skip this if you need more than 500GB, do heavy video editing, or constantly move large files. The QLC NAND and lack of DRAM will frustrate you under sustained writes. Also skip it if you find it priced near USD 150 or CAD 185, because at that point you're paying premium money for a budget drive.

This is a fine budget boot drive for a basic desktop or older laptop. If you just need Windows to load fast and don't move huge files around constantly, the SN5100 does the job. Gamers and content creators should look elsewhere, preferably at a 1TB TLC drive with a DRAM cache. The 500GB capacity is the real limitation here.