Seagate Barracuda 750 GB SATA NCQ Internal Hard Drive ST3750640AS-RK 750 GB SATA NCQ internal hard drive features SATA with 3 Gbps and Native Command Queuing 16 MB cache buffer; 7200 RPM for fast read/write times Whisper-quiet with a 2.5 bels idle and 2.8 bels seek acoustics Includes internal drive, interface cable, serial ATA power cable Also contains DiscWizard installation software, SeaTools diagnostic software, quick install guide, and mounting screws 5-year limited warranty