Micronet Technology Fantom Online Kit 2TB 64MB Cache 3.5-Inch Internal Hard Drive (FAN-ST2000DM001-KIT) 2TB storage capacity with SATA 6Gb/s NCQ Interface SATA 6Gb/s interface optimizes burst performance Seagate AcuTrac servo technology delivers dependable performance, even with hard drive track widths of only 75 nanometers Seagate OptiCache technology boosts overall performance by as much as 45% over the previous generation. Best Fit Applications include: Desktop or all-in-one PCs, Home servers , PC-based game systems, Desktop RAID, Direct attached external storage devices (DAS), Network attached storage devices (NAS)