16 Facts About RAM

RAM contains multiplexing and demultiplexing circuitry, to connect the data lines to the addressed storage for reading or writing the entry.

RAM is normally associated with volatile types of memory, where stored information is lost if power is removed, although non-volatile RAM has been developed.

SRAM became an alternative to magnetic-core memory, but required six MOS transistors for each bit of data.

Toshiba's Toscal BC-1411 electronic calculator, which was introduced in 1965, used a form of capacitive bipolar DRAM, storing 180-bit data on discrete memory cells, consisting of germanium bipolar transistors and capacitors.

The first commercial SDRAM chip was the Samsung KM48SL2000, which had a capacity of 16Mbit.

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GDDR is a form of DDR SGRAM, which was first released by Samsung as a 16Mbit memory chip in 1998.

Writeable variants of ROM share properties of both ROM and RAM, enabling data to persist without power and to be updated without requiring special equipment.

In general, the term RAM refers solely to solid-state memory devices, and more specifically the main memory in most computers.

In optical storage, the term DVD-RAM is somewhat of a misnomer since, unlike CD-RW or DVD-RW it does not need to be erased before reuse.

Nevertheless, a DVD-RAM behaves much like a hard disc drive if somewhat slower.

In SRAM, the memory cell is a type of flip-flop circuit, usually implemented using FETs.

In many modern personal computers, the RAM comes in an easily upgraded form of modules called memory modules or DRAM modules about the size of a few sticks of chewing gum.

Software can "partition" a portion of a computer's RAM, allowing it to act as a much faster hard drive that is called a RAM disk.

The RAM disk is reloaded from the physical disk upon RAM disk initialization.

Several new types of non-volatile RAM, which preserve data while powered down, are under development.

Some kinds of random-access memory, such as "EcoRAM", are specifically designed for server farms, where low power consumption is more important than speed.