Brand 320GB Hard Disk Drive/HDD for HP/Compaq 6510 6515 6530b 6531s 6535b 6710b 6715s 6720s 6820 6830s 6910p 8510w 8710p nc2400 Interface: PATA, Capacity: 320GB, RPM: 5400RPM, Cache: 8MB, Size: 2.5 Inchs Package Include: 320GB 5400RPM Internal Hard Disk Drive