Western Digital
Western Digital has expanded its SSD range with the new WD Green SN350 line. The units, distributed within the M.2 2280 form factor, will be available in capacities ranging from 240GB to 960GB. SN350 is an entry-level SSD that offers full support for the PCIe 3.0 x4 interface but, currently, the model of the SSD controller and the type of NAND used remain currently unknown. However, the lifespan data of these drives suggests that Western Digital uses NAND QLC (with four-level cells). In fact, the manufacturer estimates that the 960GB, 480GB and 240GB SN350 units have a lifespan of 80TBW, 60TBW and 40TBW respectively. For comparison, the 250GB and 500GB WD Blue SN550 drives, which leverage NAND TLC (with three-level cells), are rated at 150TBW and 300TBW respectively.SN350 performance varies a depending on capacity, then larger drives will also provide more performance. The WD Green SN350 sports sequential read and write speeds of up to 2,400MB / s and 1,900MB / s, respectively. In terms of random performance, the SN350 can be expected to deliver random read and write speeds of up to 340,000 IOPS and 380,000 IOPS, respectively. From a performance standpoint, the SN350 shouldn't stray too far from the SN550. However, the SN350 is less durable and comes with a three-year limited warranty instead of the SN550's five-year warranty.
The 240GB and 480GB models sell for $ 43.99 and $ 54.99 respectively. while for the 960GB model it will be necessary to shell out $ 99.99. Compared to the SN550, the SN350 costs 10 to 30 dollars less for the same capacity.
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