Types of RAM

There is no doubt that the RAM (Random Access Memory) is one of the most important components of a computer, since that all the process that runs on the PC depends of this circuit board.  The RAM memory is the responsible for maintaining stored the data and instructions that the processor and software needs to fulfill their orders.

The term “Random access” was conceived to describe how the process of writing and reading of data is performed in these memories. Basically by this way, to write or read data do not need to wait to access a specific position in a specific order, which offers the important advantage to performing the fastest mode.

Types of RAM

Everything about RAMs is really exciting, and that is why we invite you continue reading this article, where you will find a wealth of information about this topic.

Currently, the RAM modules have incorporated a lot of technology that allows them to provide greater speed in the process, with superior stability compared to the old modules that were used several years ago.

Unlike the old RAM, which operated asynchronously with the bus clock, and only achieved a speed of 66 Mhz, today RAMs are built with the right technology that allows them to use a synchronization signal, in order to increase the speed of their functions read and write, reached speeds up to 2666 MHz. in DDR3 memories.

Types of RAM

Today, among the RAM memories that can be found in the current market, there are several types that differ in their physical form and speed capabilities that manage to develop.

Which type of memory is adequate to install on your PC? It will depend on the type of motherboard that has the computer because full compatibility of the elements is necessary to make them work properly. If the motherboard does not support memory type, these not even enter into the slots.

Usually, the memories that are currently used in desktop computers are generally DIMMs, allowing synchronized random access bus clock to improve performance in the speed of the processes.

Furthermore, RAM can be of DDR, DDR2, DDR3 or RDRAM, which are differentiated by the speed they can reach, and performance under various conditions.

DDR SDRAM memory

It was one of the memory modules most used previously, without a doubt, which is characterized by being synchronized and operate by sending data in duplicate on each clock cycle.

Comparison Chart speed in the different versions of DDR
PC1600 or DDR 200 200 MHz.
PC2100 or DDR 266 266,6 MHz.
PC2700 or DDR 333 333,3 MHz.
PC3200 or DDR 400 400 MHz.
PC4500 or DDR 500 500 MHz.


This allows to the memory module to get the double of processing speed than bus system itself, offering adequate performance.

Types of RAM

Notably that DIMM DDR SDRAM memories have 184 contacts connection to the motherboard.


DDR2 type memories are actually a breakthrough in the technology of DDR memory, thanks to a series of structural changes have increased the performance of the component.

It is a DIMM that has 240 contacts, characterized by a speed doubled frequency compared with the DDR type, thereby enabling the realization of four transfers per clock cycle, unlike DDR that only allow up to two transfers.

Comparison Chart speed in the different versions of DDR2
PC2-4200 or DDR2-533 533,3 MHz.
PC2-5300 or DDR2-667 666,6 MHz.
PC2-6400 or DDR2-800 800 MHz.
PC2-8600 or DDR2-1066 1066,6 MHz.
PC2-9000 or DDR2-1200 1200 MHz.


Widely used in all types of implementations, DDR2 memory were replaced in the market by its successor: the DDR3.

Types of RAM

This new technology is characterized by offering significant improvements in behavior and performance of the equipment RAM.


In such a system it has been incorporated which allows them to offer considerable performance with low voltage level, thus offering the possibility to drastically reduce energy consumption.

Comparison Chart speed in the different versions of DDR3
PC3-6400 or DDR3-800 800 MHz.
PC3-8500 or DDR3-1066 1066,6 MHz.
PC3-10600 or DDR3-1333 1333,3 MHz.
PC3-12800 or DDR3-1600 1600 MHz.
PC3-14900 or DDR3-1866 1866,6 MHz.
PC3-17000 or DDR3-2133 2133,3 MHz.
PC3-19200 or DDR3-2400 2400 MHz.
PC3-21300 or DDR3-2666 2666,6 MHz.


While DDR3 DIMM modules are 240-pin type, like DDR2, the fact is that both are incompatible, so the most modern and sophisticated motherboard incorporate special sockets for DDR3 memory.

Types of RAM

Finally, there is another type of memory that is characterized as one of the most expensive models due to the fantastic performance they provide.

Rambus DRAM memories

Also known as RDRAM, this type of memory operate under a proprietary protocol developed by the company Rambus. Because of its high costs, the market for ordinary users do not usually use this type of memory, which has gained increased popularity the modules of the DDR type.

Currently the RDRAM memories are usually used in large servers and is built to the famous PlayStation 3 game console.

It is a module of RIMM type, which has 184 contacts, and works completely differently to the conventional DDR, as it works raising the frequencies of the chips, to thereby avoid bottlenecks that can reduce data transfer rate, thus achieving a higher performance range.

Types of RAM

It is worth mentioning that when we acquired a RAM, it has a series of numbers that tells us the characteristics possessed by the module, which is important to know what that information means.

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