Western Digital Caviar Blue 320 GB Bulk/OEM Hard Drive 3.5 Inch, 8 MB Cache, 7200 RPM SATA II WD3200AAJS Ships in Certified Frustration-Free Packaging WD Caviar Blue hard drives are available with either SATA or EIDE interface in a variety of cache sizes with a multitude . WhisperDrive technology minimizes noise to levels near the threshold of human hearing. IntelliSeek - Calculates optimum seek speeds to lower power consumption, noise, and vibration.