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 to deliver rock solid performance and ultra-cool and quiet operation. Pick the drive that suits your needs with the confidence in knowing that all WD Caviar Blue drives are built to the highest standards of quality and reliability. With capacities ranging from 40 GB to 640 GB, these drives are the perfect solution for family and business computing.