Western Digital Green SN350 2000GB

The Western Digital Green SN350 2000GB utilizes a streamlined, DRAM-less architecture designed to maximize storage density within the limitations of the PCIe 3.0 interface. The 2TB model shifts to QLC (Quad-Level Cell) NAND managed by an in-house SanDisk/Western Digital proprietary controller and leverages Host Memory Buffer (HMB) to compensate for the lack of onboard DRAM. The drive is optimized for read-heavy workloads, has an official endurance rating of 100 TBW, and exhibits significant write performance degradation once the pseudo-SLC cache is saturated.

Key Specifications

• Interface: PCIe Gen 3.0 x4 (NVMe 1.3)
• Controller: WD/SanDisk Proprietary (DRAM-less)
• NAND Type: QLC (Quad-Level Cell)
• Sequential Read: Up to 3200 MB/s
• Sequential Write: Up to 3000 MB/s
• Endurance: 100 TBW
• Form Factor: M.2 2280 (Single-sided PCB)

Hardware Alternatives

• Crucial P3 2000GB: Acts as the direct architectural competitor, featuring a similar DRAM-less controller paired with QLC NAND. Both drives exhibit similar behavior regarding SLC cache saturation and endurance limitations.
• Western Digital Blue SN570: Represents the immediate internal alternative; while it shares the DRAM-less design philosophy of the SN350, it utilizes TLC NAND, offering vastly superior endurance (900 TBW for 2TB) and sustained write consistency.
• Kingston NV2 2000GB: Competes in the same entry-level PCIe segment. However, unlike the SN350 which uses a vertically integrated WD supply chain, the NV2 is a "fabless" design with variable component sourcing (Phison or SM2263XT controllers mixed with varying NAND types).