SAMSUNG 850 PRO 2.5 256GB SATA III 3-D Vertical Internal Solid State Drive (SSD) MZ-7KE256BW Max Sequential Read: Up to 550 MBps Max Sequential Write: Up to 520 MBps 4KB Random Read: Up to 100,000 IOPS Controller: Samsung MEX Controller 4KB Random Write: Up to 90,000 IOPS Power Consumption (Active): 3.5W Power Consumption (Idle): 0.5W Used For: Consumer