WD  WD5000KSRTL/WD5000AAKS Caviar 500 GB SATA Hard Drive 500 GB SATA 3.5-inch internal hard drive; advanced acoustics and cool operation for high-end computers, multimedia and gaming systems 7200 RPM spin rate; 16 MB cache; 300 MB/s transfer rate WhisperDrive technology minimizes noise; SoftSeek technology increases operational efficiencies Data Lifeguard Tools protect data; ShockGuard protects hard drive during operation Designed for low-power consumption, 3-year limited warranty