Primary Storage Devices

List of primary storage devices, Different type of primary storage devices

Primary Storage

• Directly accessible to the CPU

• Computer cannot run without Primary memory

• Fastest memory

• Costly memory

Primary Storage Devices	Storage Capacity	Volatile / Non-volatile	How data written?	Types
Random Access Memory (RAM)	32GBs (as on 2016)	Both	Electric	SRAM, DRAM, SDRAM, DDR SDRAM, VRAM
Cache Memory	Few MBs	Volatile	Electric
ROM (Firmware)	Few KBs	Non-volatile	Integrated Circuits	PROM, EPROM, EEPROM

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