WD Desktop 2 TB SATA Hard Drives ( WDBH2D0020HNC) Product Specifications Interface SATA 6 Gb/s Performance Specifications Rotational Speed IntelliPower * Buffer Size 64 MB Transfer Rates Buffer To Host (Serial ATA) 6 Gb/s (Max) Physical Specifications Formatted Capacity 2,000,398 MB Capacity 2 TB User Sectors Per Drive 3,907,029,168