OCZ 250GB Z-Drive p84 PCI-Express SSD. Solid-state drive capacity: 256 GB, Solid-state drive interfaces: PCI Express. Read speed: 770 MB/s, Write speed: 640 MB/s. Mean time between failures (MTBF): 900000 h. Operating temperature range (T-T): 5 - 55 °C, Storage temperature range (T-T): -20 - 80 °C. Weight: 0.5 kg, Depth: 195 mm, Width: 32 mm