Difference between DDR2 and DDR3 RAM

There are two basic types of RAM - DDR2 and DDR3. The full form of RAM is “Random Access Memory”.

Normal DDR RAM has the speed up to 1600 MB/s, but DDR2 and DDR3 RAM are upgraded version of RAM. The DDR stands for "Double Data Rate". That means DDR2 and DDR3 works faster than normal SDRAM. It can transfer data at roughly twice the speed of SDRAM.

Differences between DDR2 and DDR3.

		DDR2	DDR3
1	Definition	DDR2 stands for Double Data Rate Version 2.	DDR3 stands for Double Data Rate Version 3.
2	Speed	Up to 3200 MB/s	Up to 6400 MB/s
3	Cost	DDR2 is cheaper than DDR3	DDR3 is costlier than DDR2.
4	Transfer Rate	DDR2 gives 4 knowledge transfer per cycle.	DDR3 gives 8 knowledge transfer per cycle.
5	Supply Voltage	Required is 1.8 volts.	Required is 1.5 volts.
6	Power Consumption	DDR2 consumes more power	DDR3 consumes less power than DDR2
7	Memory Reset	No memory reset option available.	Memory reset option is available.
8	Clock Speed	Between 400 MHz to 800 MHz.	Between 800 MHz to 1600 MHz.

 

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