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What is the Difference between DDR2 and DDR3 Ram ?

What is DDR?

The term “DDR” stands for Double Data Rate RAM. This term came into use at the turn of the century when the first Double Data Rate RAM modules arrived. Double Data Rate RAM was capable of two data transfers per clock cycle, giving it twice the theoretical peak bandwidth of previous SDRAM while running at the same clock speed.

What’s the Difference between DDR2 and DDR3 RAM?

Number of Pins
Clock Speed
Max Transfer Rate
Voltage

DDR2 RAM
240 pins
400 to 1,066 MHz
3,200 to 8,533 MB/s
1.8V

DDR3 RAM
240 pins
800 to 2,133 MHz
6,400 to 17,067 MB/s
1.5V

Number of Pins

240 pins

240 pins

Clock Speed

400 to 1,066 MHz

800 to 2,933 MHz

Max Transfer Rate

3,200 to 8,533 MB/s

6,400 to 17,067 MB/s

Voltage

1.8V

1.5V

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