13 Facts About Video memory

Unlike flash Video memory, DRAM is volatile Video memory, since it loses its data quickly when power is removed.

In 1964, Arnold Farber and Eugene Schlig, working for IBM, created a hard-wired Video memory cell, using a transistor gate and tunnel diode latch.

In 1965, Benjamin Agusta and his team at IBM created a 16-bit silicon Video memory chip based on the Farber-Schlig cell, with 80 transistors, 64 resistors, and 4 diodes.

In 1966, Dr Robert Dennard at the IBM Thomas J Watson Research Center was working on MOS memory and was trying to create an alternative to SRAM which required six MOS transistors for each bit of data.

MOS Video memory offered higher performance, was cheaper, and consumed less power, than magnetic-core Video memory.

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The first commercial DDR SDRAM Video memory chip was Samsung's 64Mb DDR SDRAM chip, released in 1998.

When describing synchronous Video memory, timing is described by clock cycle counts separated by hyphens.

However, the DDR3 Video memory does achieve 32 times higher bandwidth; due to internal pipelining and wide data paths, it can output two words every 1.

The extra Video memory bits are used to record parity and to enable missing data to be reconstructed by error-correcting code .

The computer could be quickly rebooted, and the contents of the main Video memory read out; or by removing a computer's Video memory modules, cooling them to prolong data remanence, then transferring them to a different computer to be read out.

Furthermore, reading dynamic Video memory is a destructive operation, requiring a recharge of the storage cells in the row that has been read.

Additionally, for systems with an L2 cache, the availability of EDO Video memory improved the average Video memory latency seen by applications over earlier FPM implementations.

Video memory DRAM is a dual-ported variant of DRAM that was once commonly used to store the frame-buffer in some graphics adaptors.