WD_Black™ Performance Mobile Hard Drive 500GB WD5000LPSX Features: No Compromises Feature Rich High Performance Dynamic Cache Proven Mechanical Architecture NoTouch Ramp Load Technology The WD Advantage Specifications: Capacity 500 GB Interface SATA III Transfer Rate up to 6Gb/s Drive 2.5" Form Factor 2.5 Inch Disk Speed (RPM) 7200rpm Compatibility WD_Black™ 2.5-inch hard drives are designed and tested for use in small form factor desktop PC's, PC laptops, Mac laptops. Dimensions (L x W x H) 3.94" x 2.75" x 0.28" Cache Size 64MB