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How computer memory works

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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.

how computer memory works,how  memory RAM works,RAM memory upgrade,RAM or PC memory,DDR2 and DDR

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.

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