RAM is the acronym of the English concept of Random Access Memory (random access memory). It is the memory that, on a computer, is used by a processor to receive instructions and save the results.
It can be said that the RAM is the work area of a computer software. It is known as cache memory intermediate between the processor and the RAM, which provides quick access to main memory (which is often placed on the hard disk).
The RAM is the place where orders that must run devices as the processor will be loaded. It random access is linked to the temporary waiting period for the execution of an instruction is equal in any position (no need to respect a certain order to get to the data).
RAM modules, known simply as RAM memory, are a component of the hardware that includes integrated circuits that are soldered to the printed circuit board. These modules are installed on the motherboard so that they act as RAM of the computer.
The main standards of these RAM modules are SIMM (which was in disuse, had up to 32-bit data bus), DIMM (used by desktop computers, has a 64-bit data bus) and SO-DIMM (used by the notebooks, also known as laptops or notebooks).
When purchasing a RAM memory module, it is likely that we see the acronym DDR accompanying the model that we need. It’s a technology that translates as “double rate” and that offers the possibility of sending and receiving data via two channels simultaneously in each clock cycle.
At first, teams that used this type of memory were those that had an AMD Athlon processor, contrary to Pentium 4 computers, making exclusive use of memories less economic calls RAMBUS. Once the DDR technology was successful in the market, especially considering that it surpassed in its competition performance, Intel could not help get on the train of the double transfer rate. Their first DDR-compatible processor models were the Pentium 4 with FSB (Front Side Bus) 64-bit and whose internal clock frequencies were between 200 and 400 MHz.
The nomenclature used for your identification has the following format: PC-XXXX. In he is specifies the width of band, which is obtained multiplying the frequency by 2, given the principle of double rate, and then by 8 bytes, that is the amount of information that a module is capable of transfer in each cycle of clock. To better understand the calculation, take for example PC3200: based on the 200 MHz of your watch, we double them and multiply them by 8 bytes, which gives 3200 MB per second. Is important remember that MHz makes reference to a million, for which 200 is actually 200,000,000, and from there take the “Mega” for the result.
Its evolution were DDR2 memory modules, which allow the transfer of 4 bits per clock cycle, two to the ida and two on the return. Then appeared DDR3, which substantially improved the speed and increased considerably the limit of memory as possible in each module, reaching the 16 GB. He is expected that the next revision, called DDR4, is released to market at the end of the year 2012.
Referred to as RAM, on the other hand, to the adverse reaction to a medication. These reactions include those responses which are not intentional and that are harmful for the body, provided that they apply the recommended dose.
cheviot — Wiktionnaire
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