Volatile memory

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Computer memory types

Volatile

DRAM, e.g. DDR SDRAM SRAM Upcoming Z-RAM TTRAM Historical Delay line memory Selectron tube Williams tube

Non-volatile

ROM PROM EPROM EEPROM Flash memory Upcoming FeRAM MRAM CBRAM PRAM SONOS RRAM Racetrack memory NRAM Millipede Historical Drum memory Magnetic core memory Plated wire memory Bubble memory Twistor memory

Volatile memory, also known as volatile storage or primary storage device, is computer memory that requires power to maintain the stored information, unlike non-volatile memory which does not require a maintained power supply.

Most forms of modern random access memory (RAM) are volatile storage, including dynamic random access memory (DRAM) and static random access memory(SRAM). Content addressable memory and dual-ported RAM are usually implemented using volatile storage. Early volatile storage technologies include delay line memory and Williams tube.