Capacity: 1TB, Form Factor: 3.5-Inch Connector: SATA, Interface: SATA, Transfer Rate: Up to 150MB/s, Disk Speed: 7200 RPM, Recording Technology: CMR, Cache Size: 64MB, Dimensions: 5.79 x 4 x 1.03, Weight: 0.99 lbs,Model Number: WD1003FZEX,Operating Temperature: 5C to 55 Non-Operating Temperature: -40C to 70C,Drive: 3.5 Product Features: Designed for gamers, system builders, and professionals,2X DRAM cache up to 256MiB for faster read speeds on higher capacity models, Stable Trac and Dynamic Cache Technology (2TB and up), Compatibility: PC, Mac (requires reformatting),