OCZ Vertex Plus R2. Solid-state drive capacity: 240 GB, Size: 63.5 mm (2.5 "), Solid-state drive interfaces: Serial ATA II. Read speed: 255 MB/s, Write speed: 255 MB/s, Random write (4KB): 12000 IOPS. Power consumption (standby): 0.48 W, Power consumption (read): 1.67 W, Power consumption (write): 1.67 W. Mean time between failures (MTBF): 1500000 h. Windows operating systems supported: Windows 7 Home Premium, Windows 7 Home Premium x64, Windows Vista Ultimate, Windows XP Professional