Western Digital (WD) announced a new line of Caviar Blue line of 3.5" SATA hard drives that make use of the SATA 6 Gb/s interface. Caviar Blue strikes a balance between performance and energy efficiency, it's a middle-ground between the performance-oriented Caviar Black, and energy efficiency-oriented Caviar Green. The drive uses a spindle speed of 7200 RPM. The new lineup of Caviar Blue drives also support 4K sectors, also known as Advanced Format. The drives are available in capacities of 250 GB, 320 GB, and 500 GB, which feature 16 MB cache; 750 GB and 1 TB, which feature 32 MB cache. Fairly standard pricing which are on par with prices of existing price per gigabyte of Caviar Blue drives, can be expected.