What is RAM DDR?

What is RAM DDR?

Remembering the word of DDR, he remembered Ram. In order to change the computer's RAM, first asked how much brother's brother? Our answer is simple, 2, 3, etc.
But actually I do not know what the DDR?

DDR's full meaning is double data rate, the frequency of RAM and the voltage judgment, the update face or better form of data rate is named DDR, DDR2, DDR3. Get started To achieve this, the development activities of SDRAM or Dynamic Random Access Memory were started. The RAM technology at that time was dependent on the daram. This daemon used asynchronous interface. That is, the memory worked differently or freely from the processors. As a result, all the processor's instructions were frozen. SDRAM simplifies this process. The instructions given by the system bus would have kept them in a queue and when one end, another started. In this way the computer started performing tasks faster than before. By the end of the decade of 90s, this kind of memory started using all computers as standard. With the expansion of the computer, the problem starts with its speed. DDR's full-size double data rate. In 2000 this method was discovered. It used 184 pins of DIMM. The data transfer rate doubles as SDRAM. The added advantage is that the memory works at the lower clock rate and consumes less power but increases the speed. DDR is added to 2003. Data exchange rate on DDR 2 is faster and this rate increases even in DDR 3. In Dai case, the use of 240 pi is DIMM. DDR3 transfer rate of 2133 MTPS, which is twice the DDR 2. It can work with very little power, even it can run in 1.5 volts. Its speed is 400-1066 megahr.
DDR is currently running in the market, DDR 5 fences will be announced, some organizations have announced that it will not be able to say more than its capacity.

Four types of RAM frequency and voltage list

Frequency of DDR / DDR1 RAM is 100-400 MHz and Voltage: 2.5-2.6,
Frequency of DDR2 RAM 533-800 MHz and Voltage: 1.8
Frequency of DDR3 RAM 066-1333 or higher MHz and Voltage: 1.5
Frequency of DDR4 RAM 800 - 2133 MHz and Voltage: 1.2