Sony VGN-NS31M/S, VAIO. Processor frequency: 2.16 GHz, Processor family: Intel Pentium, Processor model: T3400. Internal memory: 4 GB, Internal memory type: DDR2-SDRAM, Memory clock speed: 667 MHz. Total storage capacity: 320 GB, Compatible memory cards: MS Duo, MS Pro, MS Pro Duo, SD. Display diagonal: 39.12 cm (15.4"), Display resolution: 1280 x 800 pixels, Aspect ratio: 16:10. Discrete graphics adapter model: AMD Radeon HD 3430, Maximum graphics adapter memory: 1510 MB