HP 3520, Pro. Processor clock speed: 3.3 GHz, Processor family: Intel Core i3, Processor model: i3-3220. 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: Memory Stick (MS), MMC, MS PRO, SD, SDHC