In distinction from the microcontroller, SoC devices are equipped with central units with comparatively large computational power, making it possible to run the operational system. The Broadcom BCM2835 contains the ARM1176JZFS processor, VideoCore IV GPU graphics, and
256 MB (Model A) or 512 MB (Model B) of RAM memory. Raspberry Pi does not include a built-in hard disk or solid- state drive, but it uses an SD card for booting (the operating system is installed on the SD card) and persistent storage (the card is used to store all data).