Capacity 256GB Form Factor M. 2 2280 NAND Flash Synchronous MLC Controller LSI SF-2281 Dimensions (L x W x H) 22 x 80 x 3. 5mm Weight 8g (0. 28oz) Interface SATA 6Gb/sec Performance(Max) 128GB Performance (ATTO) Read : Up to 550MB/s Write : Up to 530MB/s Maximum 4K Random write IOPS up to 89K 256GB Performance (ATTO) Read : Up to 550MB/s Write : Up to 530MB/s Maximum 4K Random write IOPS up to 90K 512GB Performance (ATTO) Read : Up to 550MB/s Write : Up to 530MB/s Maximum 4K Random write IOPS up to 30K Operating temperature 0~70 °C / -40~85°C Storage temperature 5 ~ 95% RH (0 ~ 55°C) Shock resistance 1500G / 0. 5ms MTBF 1,200,000 hours.