 |
Computer memories
The computer has several devices capable of
storing certain amount of information in a
very short period of time; this fact is very
useful today since the year 1940 with some
theories of Von Neumann. These components
are called memories and they have to fulfill
a series of different functions. |
|
|
At present time, there are reports used to
speed up information processing, some of
them are of the type
ROM,
RAM and Cache, the
ROM (Read Only Memory) based its operations
on read – only memory or used to be read
only, the data stored cannot be edited or
deleted even without being connected to
energy, such reports generally contain data
on the system configuration and settings.
Recently they have been used for data store
on the system boot speed as well as hard
drives because usually these disks are
slower in reading data than writing it.
|
|
|
Furthermore, ROM is needed because it is
known that it cannot read it if you start an
executable from the same disk, explaining
why the BIOS is in the
ROM system. |
|
 |
The RAM (Random Access Memory) which is used
exclusively for random access is used mainly
for computer work, especially for those
programs that require a greater processing
speed and the ability to run several of them
simultaneously. This memory stores
information temporarily and, if it loses the
power supply, the information that was not
stored will be lost too. Because of this is
that it is sometimes called volatile. |
|
The RAM memory is divided into two types, a
static and a dynamic type, the first type is
characterized by its fixed information not
being edited as long as it is connected to
energy, by contrast, the dynamics are
debugging your data while you read it and,
in order to avoid eliminating this data,
which is needed to make a restoration of the
information stored in the cells, this
process is called data refresh. Currently
they sell from integrated
DDR3 RAM up to
16GB (improving
DDR2 and
DDR).
The Cache memory is composed of numerous
duplicates of areas covered by the random
access memory, taking into consideration
that the first ones are the ones that cause
a further delay when accessing them.
|
|
|
That means that, when the processor follows
a set of instructions, it will look for that
instruction in the cache memory and then it
will load it, but if happened that it was
not there, then there will be some period of
delay in which it will seek a set of
instructions in
RAM memory, and then copy
them in the cache and just then, once the
other process is over, it will load it into
the processor.
That is why the cache is very useful and it
is becoming more necessary as time goes by,
especially if the processes have already
been implemented, because then the only
thing left to do will be to address the
processes that are ready to used into a
faster and simpler access to the processor.
In conclusion, it could be said that the
objectives of this type of memory are to
accelerate the memory processing
instructions and the more content you have
this memory, the faster the computer's
performance level will be.
The Cache memory is strategically located
between RAM and the microprocessor to
transmit and store data, this memory is
about 5 times faster than the
RAM though its
storage capacity is less, due to this fact
it has a very expensive price, which is
about 20 times with respect to the dynamic
memory (DRAM) but as stated earlier, the
price goes unnoticed because it is included
in the microprocessor.
Tags:
how computer
memory works,how
memory RAM works,RAM
memory upgrade,RAM
or PC memory,DDR2
DDR |
|
|
|
|
|
|
