Samsung Electronics 840 EVO-Series 1TB 2.5-Inch SATA III Single Unit Version Internal Solid State Drive MZ-7TE1T0BW Highest-quality components and engineering from the #1 memory manufacturer Worry-free data security with AES 256-bit full-disk encryption No moving parts means no hard drive spin ups, no noise and superior data protection An innovative lightweight design that allows you to work smarter and play longer. Sequential Read Speed 540 MB / Sequential Write Speed 520 MB / Random Read Speed 98K IOPS / Random Write Speed 90K IOPS