Western Digital 250 GB Caviar Blue SATA 3 Gb/s 7200 RPM 8 MB Cache Bulk/OEM Desktop Hard Drive - WD2500AAJS WD Caviar Blue hard drives are available with either SATA or EIDE interface in a variety of cache sizes with a multitude of available features WhisperDrive technology minimizes noise to levels near the threshold of human hearing. IntelliSeek - Calculates optimum seek speeds to lower power consumption, noise, and vibration.