WESTERN DIGITAL WD2500AAKX Caviar Blue 250GB 7200 RPM 16MB cache SATA 6.0Gb/s 3.5 internal hard drive New - Bare Drive 1-Year Warranty Western Digital WD2500AAKX WESTERN DIGITAL WD2500AAKX Caviar Blue 250GB 7200 RPM 16MB cache SATA 6.0Gb/s 3.5 internal hard drive