Understanding and explanation of RAM DDR, DDR2,DDR3and DDR4

Technological developments have been present creates interesting changes, especially in the field of computer one ram used on computer. computer at the time 2002 is still a lot of computers that we encounter still use memory types of single data rate or to be known by (SDR) SDRAM, along with the development now speed acces that is expected of computer users could more easily thanks to thanks to the presence of RAM technologically Double Data rate (DDR), ranging from DDR (DDR1), DDR2 and DDR3.kecepatan which have for menerasnfer rate can be faster 2X, faster than the previous generation.

DDR stands for Double Data Rate. DDR means that the development of SDR SDRAM (Single Data Rate Synchronous Dynamic Random Access Memory). DDR SDRAM has the characteristics twice the speed of SDR SDRAM obtained because the efficiency of data transmission through the efficiency of the clock signal with respect to time. If SDR SDRAM only send data on the transition to DDR SDRAM clock then the data is sent to two clock signal transitions.

SDRAM (Synchronous Dynamic Random Access Memory)

RAM is designed to be in sync with the clock frequency of the CPU. The term "Synchronous" is described on the behavior of RAM that can be passed from the CPU clock cycle appropriately. It can also increase the CPU because it does not have to wait in order to make access to the RAM.

Two types of DRAM (Single Data Rate) and DDR (Double Data Rate)

1.SDR duty to send data at a clock transition that is currently up or down only (rising / falling)
2.DDR duty to transmit data on two current clock transitions up and down (rising and falling). This makes DDR RAM is twice faster than SDR ram.

Only for the RAM type of DDR SDRAM that is developing the next stage of SDR SDRAM RAM. In development, there are some types of RAM DDR SDRAM, the DDR or DDR1, DDR2, DDR3 and DDR4. The first DDR RAM, known as DDR1 emerged in the era of the Intel Pentium processor, and then replaced with a DDR2 RAM era DUAL CORE processor then the era Core i3 processor is replaced with DDR3 RAM.






ram difference between DDR, DDR2 and DDR3.

DDR (Double Data Rate) RAM This is the generation 1, which has a frequency transfer between 200 MHz to 400 MHz, DDR RAM also has several types, including DDR-200 which has a memory clock of 100 MHz, DDR-266 which has a memory clock of 133 MHz , DDR-333 with a 166 MHz memory clock, and DDR-400 with a memory clock of 200 MHz, with a voltage of 2.5 / 2.6 V 2.

DDR2 RAM which has a standard name DDR2-400, DDR2-533, DDR2-677, DDR2-800 and DDR2-1066, with transfer frequencies between 400 MHz to 1966 MHz. which requires a voltage of 1.8 V. 3.

DDR3, difference DDR3 DDR2 lies in the frequency transfer higher reaches 2133 MHz, while DDR2 maximum of only up to 1066 MHz, in terms of memory clocknya not much different from the DDR2 ie from 100 MHz to 266 MHz, with a voltage which is only 1, 5 V.

DDR4 is the latest generation of RAM DDR SDRAM with data transfer reaches 2133 ~ 3200 MT / s. DDR4 RAM is also more efficient with a working voltage of 1.2V. With a voltage of 1.2V is recorded DDR4 RAM capable of achieving data transfer rate of 2400 MT / s.

 

Differences by naked eye:
there are also differences in the visible between the memory type DDR with the type of DDR2 and DDR 3. The first is the type of memory chip used, In memory type DDR 1 memory chip (IC) used in the module board is a type TSOP (Thin small- outline packege) looks rectangular with legs on the left and right. in today has rarely still using DDR memory module 1 with the memory chip BGA types

In the type of DDR2 memory, a type of memory chip used is the type of BGA (Ball Grid Away). The form there are rectangular, and there are square. But, unlike the TSOP type of memory chip, the legs of the BGA type of memory is not visible because it lies below the visible part of the chip and directly plugged into the board memori.dan module for DDR 3 have in common with the type of DDR 2 memory that is with BGA (Ball Grid Away).

Other difference is the number of pins used. Pin DDR memory has as many as 184 pieces (92-pin on each side), while the DDR2 and DDR memory type 3 has a smaller pin and a solid amount is 240 pieces (120-pin on each side). so that's the difference between RAM DDR, DDR2, and DDR3.

And differences in the DDR4 RAM, there are four bands in which each group is able to handle operations independently. This makes the process mempu 4 DDR4 RAM data in one clock cycle and makes it obviously more efficient than DDR3 RAM