Dynamic Random-access Memory

Dynamic random-access memory (DRAM) is a type of random-access memory that stores each bit of data in a separate capacitor within an integrated circuit. The capacitor can be either charged or discharged; these two states are taken to represent the two values of a bit, conventionally called 0 and 1. Since capacitors leak charge, the information eventually fades unless the capacitor charge is refreshed periodically. Because of this refresh requirement, it is a dynamic memory as opposed to SRAM and other static memory.

The main memory (the "RAM") in personal computers is dynamic RAM (DRAM). It is the RAM in laptop and workstation computers as well as some of the RAM of video game consoles.

The advantage of DRAM is its structural simplicity: only one transistor and a capacitor are required per bit, compared to four or six transistors in SRAM. This allows DRAM to reach very high densities. Unlike flash memory, DRAM is volatile memory (cf. non-volatile memory), since it loses its data quickly when power is removed. The transistors and capacitors used are extremely small; billions can fit on a single memory chip.

Read more about Dynamic Random-access Memory:  History, Operation Principle, Error Detection and Correction, Packaging, Versions, Security

Other articles related to "dynamic, memory":

Dynamic Random-access Memory - Security
... Although dynamic memory is only specified and guaranteed to retain its contents when supplied with power and refreshed every 64 ms, the memory cell capacitors often ... be used to circumvent security and recover data stored in memory and assumed to be destroyed at power-down by quickly rebooting the computer and dumping the contents of the RAM, or by cooling the ...

Famous quotes containing the words memory and/or dynamic:

    That you’re wavin’ from the backroads by the rivers of my memory ever smilin’
    Ever gentle on my mind.
    John Hartford (b.1937)

    Magic is the envelopment and coercion of the objective world by the ego; it is a dynamic subjectivism. Religion is the coercion of the ego by gods and spirits who are objectively conceived beings in control of nature and man.
    Richard Chase (b. 1914)