WD Ultrastar DC SN640 1.6 TB PCIe Gen 3.1 x4 U. 2 NVMe 2.5 Enterprise SSD -WUS4CB016D7P3E3. WD Ultrastar DC SN630 1.92TB PCIe Gen3.1 x4 NVMe U. 2 2.5 Enterprise SSD. PCIe Gen3.1 x4 NVMe. Western Digital NVMe 1.3c compliant controller; PCIe Gen3.1×4. Western Digital BiCS4 96L 3D TLC NAND….