DDR2 vs DDR3 vs DDR4

Hello friends......

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I'm going to show you the difference between three types of dynamic RAM memories which are DDR2, DDR3, DDR4. Double data rate synchronous dynamic random-access memory (DDR SDRAM) is generally called the DDR (1,2,3or4) RAM. The difference between these three types of memory is shown in the picture-

1) Voltage-  
 The power supply needed to keep the RAM turned ON. The lower the required power supply better the RAM memory. DDR4 requires only 1.2 V while DDR3 requires 1.5V and DDR2 requires 1.8V.

2)Data Rate-  
 RAM memory usually installed on a system to support the processor for maximum  performance. So higher the amount of RAM, better the performance. But in a case where the amount of RAM is higher, but the processor is not so advance that can handle that much amount, the system performance decreases.  DDR4 has the double data rate then DDR3. The maximum data transfer rate of DDR4 is 3.2 Gb/s.

3) Clock Speed- 
 DDR4 is supporting the maximum clock speed of 1.6 GHz. The average clock speed of DDR4 RAM is 1066 MHz,  while the same of DDR3 is 800MHz and for DDR2 it  is only 400MHz.

4) Refresh Rate- 
 The maximum refresh rate of DDR4 and DDR3 is same but the range of self refresh operation of DDR4 is higher then the DDR3 as shown in the picture.

5) Temperature- 
  DDR3 and DDR4 both can operate at the temperature of 95C but the DDR2 can only operate till 85C temperature.