Seagate ST3750640A-RK Barracuda 750 GB Ultra-ATA/100 3.5-Inch Internal Hard Drive 750 GB Ultra ATA/100 3.5-inch internal hard drive internal hard drive delivers high performance and powerful features 16 MB cache buffer; 7200 RPM for fast read/write times Fluid dynamic bearing motor for ultra-quiet operation Includes internal drive, interface cable, interface cable, DiscWizard installation software, SeaTools diagnostic software, quick installation guide 5-year limited warranty covers parts and labor