RAM is the acronym for the English concept of Random Access Memory (Random access memory ). It's about the memory which, in a computer equipment, is used by a processor to receive instructions and save the results.
It can be said that RAM is the work area of the software of a computer . It is known as cache to the buffer between the processor and RAM, which provides quick access to the main memory (which is usually located on the hard disk).
RAM is the place where orders that are executed by devices such as the processor are loaded. He random access is linked to the temporary waiting period for the execution of a instruction It is the same in any position (it is not necessary to respect a certain order to arrive at the data).
RAM modules, known simply as RAM , are the component of hardware which includes integrated circuits that are soldered to the printed circuit. These modules are installed on the motherboard to act as the computer's RAM.
The main standards of these modules of RAM are SIMM (which was deprecated; it had a data bus of up to 32 bits), DIMM (used by desktop computers, it has a 64-bit data bus) and SO-DIMM (used by notebooks, also known as laptops or laptops).
When purchasing a RAM module, it is very likely that we will see the acronym DDR accompanying the model we need. It is a technology which translates as "double transfer rate" and offers the possibility of sending and receiving data through two channels simultaneously in each clock cycle.
At first, the equipment that used this type of memory was those that had an AMD Athlon processor, contrary to the computers with Pentium 4, which made exclusive use of less economical memories called RAMBUS. Once the DDR technology was successful in the market, especially considering that it outperformed its competition, Intel could not avoid getting on double transfer rate train. Its first processor models compatible with DDR were the Pentium 4 with a FSB (Front Side Bus) of 64 bits and whose frequencies Internal clock were between 200 and 400 MHz.
The nomenclature used for identification has the following format: PC-XXXX. It specifies the bandwidth, which is obtained by multiplying the frequency by 2, given the principle of double rate, and then by 8 bytes, which is the amount of information that a module is able to transfer in each cycle clock To better understand the calculation, let's take PC3200 as an example: starting from 200MHz of your watch, we duplicate them and multiply them by 8 bytes, which gives us 3200MB per second. It is important to remember that MHz refers to one million, so 200 is actually 200,000,000, and from there we take the "Mega" for the result.
Its evolution was the DDR2 memory modules, which allow transferring 4 bits per clock cycle, two on the way and two on the return. Then DDR3 appeared, which substantially improved the speed and greatly increased the limit of possible memory in each module, reaching 16GB. The next revision, called DDR4, is expected to be launched at the end of 2012.
It is known as RAM, on the other hand, to the adverse reaction to a medication . These reactions include those responses that are unintended and that are harmful to the body, provided the recommended dose is applied.