Is DDR3 memory backward compatible with DDR2 and DDR?

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No. 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.

More Information:
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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Does ddr memory work in a ddr2 motherboard?

Unfortunately not. DDR has a different amount of pins compared to a stick of DDR II. Also the slot position is slightly different. Hope this helps Be Safe Cadishead C

Will Ddr2 memory work in a ddr3 motherboard?

many Motherboards that have DDR3 slots also contain DDR2 slots. DDR2 WILL NOT WORK on a DDR3 slot, and it should not be forced in. Remember that DDR3 is VERY DIFFERENT than DD

Does ddr2 memory work in a ddr motherboard?

In order to use ddr2 memory the motherboard should support it. Check the manufacture website for more information. If it doesn't say that it has ddr2 support, it means that it

Difference between ddr ddr2 and ddr3?

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
In Motherboards

Can you use ddr3 memory with ddr2 chipset?

No. DDR3 and DDR2 are very different in speed and cant be used on each others chipsets. Also the notches are in a different place so even if you tried it wouldn't fit
In Acronyms & Abbreviations

What is Full form of ddr2 and ddr3 ram memory?

The full form of DDR is Double Data Rate. It gives two data transfer per cycle, the new version DDR2 which gives 4 data per cycle, ans latest DDR3 which gives 8 data per c
In Motherboards

Is DDR2 DIMMs and SO-DIMMS compatible with DDR?

No they are not compatiable they shouldn't even fit in the same slot due to the gaps at the connectors being different..and even fi you could get them to fit they run using di