WD Green SN350 focusses on the budget NVMe market

With little fanfare, Western Digital introduced the WD Green SN350 NVMe SSD. This lineup is aimed at the budget market, it's a step down versus the WD Blue SN550 series. The disks use the M.2 2280 form factor and the PCI Express 3.0 x4 interface. It's unknown which controller is used, WD doesn't list the type of NAND either but it's most likely QLC.

The firm offers 240GB, 480GB, and 960GB models, with an endurance rating of 40TBW, 60TBW, and 80TBW, respectively. This indicates QLC as the endurance ratings are about a lot lower than the TLC-based SN550 series, which has endurance ratings of 150TBW (for 250GB capacity) to 600TBW (for 1TB).

The new SN350 series has three years warranty, two years lower than the SN550, and is slightly slower. As is typical with SSDs, the performance depends on the capacity. The highest-performing part is the 960GB version -- it has a maximum read speed of 2400MB/s, write speeds of up to 1900MB/s, random read of 340k IOPS, and random write of up to 380k IOPS.

For comparison, the TLC-based SN550 with 1TB capacity offers the same 2400MB/s max read speed, a slightly higher 1950MB/s max write speed, 410k random read IOPS, and 405k random write IOPS.

The WD Green SN350 is priced at $43.99, $54.99, and $99.99 for the 240GB, 480GB, and 960GB versions, respectively. For a comparable capacity, pricing is about $10, $15, and $30 lower, respectively, than SN550 models.