Sony VPCJ21S1E, VAIO. 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: 1000 GB, Hard drive rotational speed: 7200 RPM. Optical drive type: DVD Super Multi. Compatible memory cards: MS Duo, MS PRO, SD, SDHC, SDXC