Samsung 250GB SSD 840. Solid-state drive capacity: 250 GB, Size: 63.5 mm (2.5 "), Solid-state drive interfaces: Serial ATA III. Read speed: 530 MB/s, Write speed: 240 MB/s, Random write (4KB): 44000 IOPS. Operating voltage: 5 V, Power consumption (read): 0.15 W, Power consumption (write): 0.15 W. Operating temperature range (T-T): 0 - 60 °C. Weight: 70 g, Height: 7 mm