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Types of Ram Memory. Characteristics and Capacity and Classes

Let’s see what is the RAM memory of the computer or PC, its features and the types of Ram that exist in the market.


Ram memory is the memory where the data (programs) with which we are working at the moment are stored. For example, if I open the word program to write with it, the program (all operating instructions of the word, ie the entire program) will be passed to the RAM. If I work with 2 or 3 programs at a time, those 2 or 3 programs will be stored in the RAM.

DO NOT mistake for the hard drive. All the programs that I have installed on my computer or PC are on the hard drive, of those programs, only the programs with which I’m working at the moment will be in the RAM. There will be many programs that will be on my hard drive but NOT in RAM.

The microprocessor, when working, only searches data in this memory, ie when we are working with a program (open program), it will be in the RAM and the micro will go there to look for the instructions that we give of the program to execute them (the microprocessor ). This makes the computer work much faster, since you only have to look for instructions in a warehouse where the instructions that I’m going to work with are located. If I had to go to find the instructions to the hard disk, it would take longer, since inside the hard disk there are many more instructions because they are all the programs that I have installed, not only with those that I am working. The RAM is a temporary memory. When the program is closed, the contents of the RAM memory disappear.

  RAM Memory Capacity
As you see the RAM is a data warehouse and logically an important feature is how much data you can store. The more data I can store, the more programs I can work with (open) and larger programs (programs with lots of data) I can execute. The amount of data entering RAM is what is called “RAM Memory Capacity”.

Be careful when buying a program or game, we have to take into account the amount of RAM you need, because if we do not have enough RAM in our computer, the program or game when you open it and try to put the instructions in the RAM , The program instructions will not enter the RAM store, therefore it will not work.

Once we close the program, the instructions will disappear from the RAM and go to your normal storage site which is the hard disk.

The most important data of RAM or characteristics of RAM are the storage capacity (Bytes, Megabytes, Gigabytes, etc.) and the speed with which it sends the data to the micro for processing. This speed is usually expressed in Hertz (Megahertz, Gigahertz, etc.).

Do not forget that you can expand your RAM by buying another RAM module and adding it to your computer by inserting it into a slot or slot called DIMM or SIMM for PCs and notebook RIMMs.

 Types of RAM Memory
RAM memories are usually classified according to their storage capacity and according to their speed. As for the capacity we have the most normal are 4GB, 8GB and 16GB but there are older. But EYE can not forget the speed that is even more important.

When the RAM started they were called SRAM (simple RAM) and DRAMs but they are already deprecated. Then came a more advanced and fast DDRAM, which means (DD) double speed that the DRAM, and then came the synchronous SDRAM or RAM, which means that they go at the same speed as the microprocessor, ie synchronized with the micro.

Nowadays the most commercialized are DDRAM, but every time that one of this improved type is extended in one the number. So we have the DDRAM, DDR2 RAM, DDR3 RAM for example. The more new and faster.

The other RAMs are usually very expensive and are only used on very powerful computers.

We also have special RAM, for its size, for laptops. They are called RAMs of RIM module, which is the module where it is introduced, which when being for laptops is smaller. On PCs slots or slots for RAM are called DIMMs.

   RAM based on speed, we have the following types of RAM:

SDRAM: They are installed without having to lean with respect to the motherboard. They are characterized in that the module has two notches. The total number of contacts is 168. They can offer a speed between 66 and 133MHZ. At present they are almost unmarketed. Here is your image.


DDR RAM: Successor to SDRAM memory, has a similar design but with only one notch and 184 contacts. It offers a speed between 200 and 600MHZ. It is characterized by using the same clock cycle to make two data exchanges at the same time.

ddr ram

DDR2 RAM: It has 240 pins. Zocals are not compatible with DDR RAM. The notch is located 2 millimeters to the left with respect to the DDR RAM. Pairs of 2GB (2x2GB) modules are marketed. They can work at speeds between 400 and 800MHz.


  DDR3 RAM: Currently the most used RAM is the DDR3 a progression of DDR, are the third generation, logically with higher data transfer speed than other DDR, but also a lower power consumption. Its speed can be up to 2 times greater than DDR2. The best of all is the DDR3-2000 which can transfer 2,000,000 data per second. As we see the final number of the memory, gives us an idea of the speed, for example the DDR3-1466 could transfer 1,466,000 data per second. (Multiplying by the number of the end the speed is taken out in data per second)


Rambus: It can offer speeds of between 600 and 1066MHZ. It has 184 contacts. Some of these modules have an aluminum cover (heat disperser) that protects the memory chips from possible overheating. Due to its high cost, its use has not been extended much.


So-DIMM: The size of these modules is smaller than the previous ones since they are used mainly in laptops. 512MB and 1GB capacities are commercialized. There are 100, 144 and 200 contacts.


Memories RIMM: Acronym of Rambus Inline Memory Module, designates memory modules Ram using a technology called RDRAM, developed by Rambus Inc.A. Despite having RDRAM technology, performance levels far superior to the SDRAM technology and the first generations of DDR RAM, due to the high cost of this technology, have not had great acceptance in the market of the PCs. Its high moment took place during The introduction period of the Pentium 4 for which the first motherboards were designed, but Intel faced with the need to launch cheaper equipment, decided to launch motherboards with support for SDRAM and later for DDR RAM by moving the latter technology to the RIMM modules of market.



Different Types of RAM

Different Types of RAM

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