RAM is a very important part of the computer, which, along with the CPU determines its speed. If you think that your computer is low on memory. you can put him in another bar of RAM. How to choose RAM?

To choose RAM, you need to know what type of memory supported by your motherboard. There are three main types of memory: DDR, DDR2 and DDR3. DDR memory was used in old computers, now it is not easy to find a computer with DDR memory. The most common type is DDR2, and the newest machines are DDR3 memory. You can find out the type of memory from the instruction manual of your motherboard.

It is also important to choose RAM a suitable clock frequency. The frequency is measured in megahertz and depends on the type of memory, but within the same type there is a different clock frequency. For example, DDR2 memory can have a frequency from 667 to 1066 MHz, DDR3 - from 800 to 1600 MHz.

Memory clock speed affects the performance of your computer. That is, two strips of the same size will be faster, the one with higher clock frequency. Usually the optimal choice for DDR2 is 800 MHz, for DDR3 - 1333 MHz.

But note that if you want to choose RAM in addition to already established, its clock frequency should be the same. The fact is that the computer for work selects a lower clock frequency from the two modules, so installing the module with a lower frequency will reduce the speed of the entire system, and installing the module with a larger one will not do anything. The volume of modules does not need to be the same.

By the way, about the volume. Most popular memory modules have a volume of 1024 or 2048 Mbytes (1 or 2 GB, respectively). The optimal amount depends on what you use your computer. For Internet and office applications may be sufficient 1 GB for games and graphics need more, at least 2 GB. However, keep in mind that when a weak processor more memory is unlikely to help.

If the total amount of RAM installed on your computer is more than 3 GB you will need to install the 64-bit operating system. The fact is that 32-bit systems "see" no more than 3.25 GB of RAM, and 64-bit systems can support up to 192 GB of RAM (depending on the version of the operating system).

More on the speed of RAM affects the so-called the timing (latency) of memory. This refers to the signal delay time that is required to execute a particular command. Without going into details, let's just say that the smaller the timing - the better: from two bars with the same frequency faster than the one with less timing.

To choose RAM, you need to understand the marking. Typically, the marking indicates the type and frequency of memory. say, DDR2-800. There is another option for marking. The type of memory is indicated by PC (PC, PC2, PC3). So, type DDR2-800 corresponds to type PC2-6400. To find the clock frequency, you need to divide the number in the marking by 8 and round it if necessary.

If you buy RAM in addition to the bar that you have already installed (that is,plan to use dual-channel mode ), it is important that not only do they have the same clock frequency, but also was one source: sometimes it happens that the modules from different manufacturers refuse to work together.

When choosing should also pay attention to the manufacturer. It is best to select RAM from the manufacturer, proven in the market — Kingston, Corsair, Apacer, OCZ, PQI, GelL, Patriot, Hynix, etc. On hearing also such known manufacturer as Samsung, but it basically produces not slats, but microcircuits, which then are used by other manufacturers.

To choose RAM is not as difficult as it may seem, but this does not mean that the chosen memory modules need to be negligent: if you want your computer "fly", you need to consider all possible characteristics of memory .