RAMs: DDR, DDR2, DDR3, DDR4 explanation in details

The way you choose RAM is very important to your computer platform, be it for gaming, overclocking, designers, or even for normal use. The popular saying goes: Oh yeah, buy the fastest frequency and pay attention! Of course, this is a 100% false talk because there are very important criteria that you should know and apply when you choose the next RAM ... and yes without my help or anyone's help! How is that? Yes, you can reach this stage very easily. Just focus with me on what I am going to tell you and before you continue with me, bring a cup of coffee, Nescafe or any drink you like and you will reach the result that will surely satisfy you.

Is there any basic information I need to know about RAM?

Everyone knows that RAM comes in different generations, from DDR generation to DDR2 and DDR3 and finally to the latest generation of DDR4, which is available today for the new X99 platform that works with Haswell-E processors, in addition to its availability with the sixth generation of Intel processors Skylake motherboards Operating with a chipset of 100 or the seventh generation. New Intel Kaby Lake processor with 200 chipset chipsets. It doesn't matter which generation you turn to as long as you use these basics that I will mention to you and which you apply to any generation you are going to.

Currently there is a trend towards DDR3 memory due to its popularity, but it can be said that the trend towards DDR2 memory is losing its acquisition rate in the market in favor of DDR3 memory, while today DDR4 memory has become very popular, especially after its obvious price decline and became affordable.

There are 4 basic factors we need to know, and they are:

Memory frequency, known as memory frequency, memory delay time, known as Memory CAS Latency, and volt, otherwise known as voltage, memory size, otherwise known as memory size. I won't go into a lot of technical details for each one of them, but I'll talk generally so you can see the benefit of it when you go to pick your next RAM.

Memory frequency:

Which is known as memory frequency, you will definitely notice that every memory has a frequency like 1333MHz or 1866MHz until it reaches a frequency that exceeds 3400MHz. The benefit of memory frequency is its increased speed, which means an increase in the performance of your device in general. The higher the memory frequency, the better, but what may be wrong in the process of increasing the frequency is the general high price of the memory, which is what some people avoid and look for a little frequency. If the first factor, we can deduce from it that the memory frequency, the better the performance of your device. Another matter related to the memory frequency, which is that the memory frequency is accompanied by another number that is observed on the memory itself, which comes in this way, for example, PCI3-20800, and the number 20800 means the data transfer rate for the memory that you own ... You only have to mention it So you know what this number is.

Certainly, most of you know this simple equation, which is that if you have memory and you know its frequency ... the transfer is 1866 MHz and you want to know the data transfer rate, all you have to do is multiply the frequency of 1866 by the number 8 and it will show you the data transfer rate of the memory 14928 MB / s .

Memory delay time:

It's known as Memory CAS Latency, and you had this combination of numbers CL 9-10-9-27 previously. These numbers are several stages that the memory performs during the implementation of the tasks assigned to it, and the times you see it, the shorter its time, the better, and the execution of tasks is faster, and this means ... a memory that works in CL 9-10-9-27 and a memory that works in CL 10 -10-12-31 ... which one do you think is better? Certainly it is the lowest and it is CL 9-10-9-27.

Always try to have the memory you choose with a short delay, your focus is always on having all numbers low, but focus on the most important, which is the CL by being low. It's true that new generation DDR4 memory comes with significant lag, but try to choose the lowest lag time you can get. The same applies to the rest of the DDR3 or DDR2 generation memory. Another thing to keep in mind is that whenever you choose high-frequency memory, you will notice that the delay time has increased, which is normal. The most important thing as I have mentioned repeatedly is choosing a memory with a slight delay.

Voltage:

Known as Voltage, each memory and memory generation, whether DDR, DDR2, DDR3, DDR4 contains a certain voltage, the more the modern generation, the voltage drop we notice,

For DDR the main voltage is 2.5 volts and the terminals one is 1.2 volts

DDR2  : 1.8 v and 0.9 v

DDR3   : 1.5 v and 0.7 to 0.8 v

DDR4   : 1.2 v and 0.6 v