Sony VPCJ21M1E. Processor clock speed: 2.1 GHz, Processor family: Intel Core i3, Processor model: i3-2310M. Internal memory: 4 GB, Maximum internal memory: 8 GB, Internal memory type: DDR3-SDRAM. Total storage capacity: 500 GB, Storage media type: HDD, Storage drive interface: Serial ATA. Optical drive type: DVD Super Multi. Compatible memory cards: MS Duo, SD