Western Digital 500GB WD Caviar SE16 SATA II /3GB/s /16M Cache / 7200RPM Hard Drives ( WD5000AAKS )

WD Caviar SE16 500 GB drives scored a 5.9--the highest possible score--on the Windows Experience Index performance tests built into Windows Vista. These drives combine 16 MB cache with 3 Gb/s transfer rate for lightning-fast performance and cool, quiet operation. Enhanced reliability features help protect the drive and the data stored on it.