OCZ Deneva 2 R Series D2RSTK251E19-0400 2.5 400GB SATA III eMLC Enterprise Solid State Drive 4KB Random Read: Up to 55,000 IOPS 4KB Random Write: Up to 80,000 IOPS Max Sequential Read: Up to 550 MBps Max Sequential Write: Up to 500 MBps Power Consumption (Idle): 1.30W Power Consumption (Active): 2.85W Operating Temperature: 0°C ~ +55°C Storage Temperature: -45°C ~ +85°C