Alternatively referred
to as main memory, primary memory, or system memory, RAM (random-access memory)
is a hardware device that allows information to be stored and retrieved on a
computer. RAM is usually associated with DRAM, which is a type of memory
module. Because data is accessed randomly instead of sequentially like it is on
a CD or hard drive, access times are much faster. However, unlike ROM, RAM is a
volatile memory and requires power to keep the data accessible. If the computer
is turned off, all data contained in RAM is lost.
Types of RAM
Over the evolution of the computer,
there have been different variations of RAM. Some of the more common examples
are DIMM, RIMM, SIMM, SO-DIMM,
and SOO-RIMM. Below is an example image of a 512 MB DIMM computer
memory module, a piece of RAM found in older desktop computers. This memory
module would be installed into one of the memory slots on a motherboard.
As the computer boots,
parts of the operating system and drivers are loaded into memory, which allows
the CPU to process instructions faster
and speed up the boot process. After the operating system is loaded, programs
you open like the browser you're using to view this
page are also loaded into memory. If too many programs are open, the
computer swaps the data in the memory between
the RAM and the hard disk drive.
A computer's performance is largely attributed to the
amount of memory contained within it. If a computer does not have the
recommended memory to run the operating system and its programs, it results in
slower performance. The more memory a computer has, the more information and
software it can load and process quickly.
Currently, the largest a single stick of RAM is 128 GB.
The first form of RAM
came about in 1947 with the use of the Williams
tube. It utilized a CRT (cathode ray tube); the data was
stored on the face as electrically charged spots.
The second widely used
form of RAM was magnetic-core memory, invented in 1947. Frederick Viehe is
credited with much of the work, having filed for several patents relating to
the design. Magnetic-core memory works through the use of tiny metal rings and
wires connecting to each ring. One bit of data could be stored per ring and
accessed at any time.
However, RAM, as we
know it today, as solid-state memory, was first invented
in 1968 by Robert Dennard. Known specifically as
dynamic random-access memory, or DRAM,
transistors were used to store bits of data.
Best Information ❤️
ReplyDelete