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AnswerNo. DDR3 is not backward compatible with DDR2 and DDR. e.g. DDR3 has 1.5V power, DDR2 needs 1.8V and DDR needs 2.5V power. In terms of standard motherboard slots also the notch or the key for different memory modules is at different place for the three type of memory thus preventing any accidental insertion in memory slots which can damage the memory and or the motherboard.

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Gateway Tech Support said their Gateway MD7820u Notebook is compatible with both.

SODIMM DDR3 might have the same pins as SODIMM DDR2.

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Q: Is DDR3 memory backward compatible with DDR2 and DDR?
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How much faster is DDR3 memory than DDR2?

It is not very noticeable if you upgrade your memory on your computer.


What is the difference between memory for DDR2 RAM and DDR3 RAM?

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.


Can you use ddr3 memory with ddr2 chipset?

Unfortunately, no. DDR RAM will not work in a DDR2 motherboard, and DDR2 RAM will not work on a DDR3 motherboard. There are a few motherboards that have slots for both DDR and DDR2, so it is conceivable that there could be motherboards with slots for both DDR2 and DDR3.


Will a video card with DDR3 memory work with DDR2 desktop memory on DDR2 motherboard?

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DDR3 is twice as fast as DDR2.It's currently the best type of memory generally available.


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DDR3 is better at the moment, however to make full use of DDR3 RAM you need a DDR3-compatible motherboard as well as a multi-core processor.


What are three considerations when choosing memory?

Speed, memory type (DDR2, DDR3 etc), and capacity.


What are ddr2 and ddr3?

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