DDR3 is twice as fast as DDR2.It's currently the best type of memory generally available.
The difference between the memory of the DDR2 RAM and the DDR3 RAM are the capacity that they can hold the DDR3 RAM is more powerful than the DDR2 RAM.
DDR2 is slower than DDR3 due to their difference in bandwidth. DDR3 has a higher bandwidth hence can transfer data at higher speeds than DDR2.
DDR3 runs at higher clocks and lower voltages due to a more complex 90nm manufacturing process than DDR2 Ram. So therefore, DDR3's main difference in comparison to DDR2 is better power usage and higher clock speeds.
There are both the same thing, ddr2 ram, is faster that ddr1 ram but ddr3 ram is more modern and faster
DDR3 runs on lower voltage, uses less power, has a frequency of 800-2000MHz (DDR2: 400-1066MHz, DDR: 200-600MHz)and the "prefetchbuffer" is 8 bits instead of DDR2's 4 bits and DDR's 2 bits. DDR3 is the only one that has the 90 nm technology.
they are different ram generations. DDR2 is the older and slower version of DDR3. DDR2 is about 800 MHz max. and DDR3 is about 1333 MHz minimum
ddr3
DDR3
It is not very noticeable if you upgrade your memory on your computer.
ddr3
DDR3 uses lower voltage
DDR3 uses 1.5V; DDR2 uses either 1.8V or 2.5V