dimensions of appearance Measurements: 80 x 22 x 3.58 mm / 3.15 x 0.87 x 0.14 in. 10 g (0.35 oz) in weight Storage Interface Bus Interface NVMe PCIe Gen3 x4 Type M.2 2280 3D NAND flash type; capacity: 256 GB, 512 GB, 1 TB, or 2 TB; Environment of Operation Temperature range for operation: 0°C (32°F) to 70°C (158°F). Voltage at Operation 3.3V±5% Sequential Performance For CrystalDiskMark, read/write Up to 3,500/2,900 MB/s for 2 TB 4K Random Read/Write (IOmeter): 1 TB up to 3,500/3,200 MB/s; 512 GB up to 3,500/2,500 MB/s; 256 GB up to 3,300/1,250 MB/s Up to 340,000/360,000 IOPS with 2 TB Up to 330,000/370,000 IOPS with 1 TB Up to 190,000/360,000 IOPS with 512 GB Up to 190,000/300,000 IOPS with 256 GB Written Terabytes (TBW) 4,400 TBW / 2 TB 1,200 TB, 2,200 TBW 512