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It's hard to find out DDR2 RAM memories nowadays. Moreover, these old ones are doing sold at a very high market price. Can I use a ddr3 ram on a motherboard which originally supports ddr2 on it? If so will there be any future problems?
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  No, motherboards do not support both DDR2 and DDR3 RAM. They are two different types of memory and are not compatible with each other. You will need to purchase a motherboard that is compatible with the DDR3 RAM you wish to use.

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No. You can't. This a common question asked by many customers in a PC hardware shop. Each and every motherboard is built in such a way that supports a special type of memory/RAM. If it is DDR2 then you must use DDR2 RAM only. You can't use a ddr3 ram on a ddr2 slot and vice versa.
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No you can't use a DDR3 on DDR2 slot in motherboard unless your motherboard supports a DDR3 RAM memory. Most commonly motherboards are not backward compatible too in case of RAM modules.
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This is not possible because the two memory boards are designed differently. A DDR3 memory won't fit at all in the slot for DDR2 memory. The same holds true if you want to add DDR2 memory to a DDR3 slot. However, they did build a few motherboards that you could either use DDR3 or DDR2 on the board. These boards gave you the choose what memory you want to use. They had 2 slots for DDR2 and 2 slots for DDR3. If your motherboard has this option then you can use DDR3 on this board.
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In past DDR 2 and DD3 used to have slots on the motherboard. Now a days the motherboards are specifically made for the new RAM. So most of them support the DDR 4 only. So if you get the board that supports the DDR 2 and DDR3 then that is also possible. 
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No you can't use ddr2 and ddr3 ram together only problem is that you need to update your mother board if hyodo that ddr2 didn't work
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Yes all the mother boards compatible with DDR (double data rate)2 and also DDR3. In the latest super computers it is easy to access. All the latest mother boards have all access to function.
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No, motherboards cannot support both DDR2 and DDR3 RAM. You will need to buy a new motherboard that supports the type of RAM you want to use. DDR2 RAM that is still available is generally more expensive than DDR3 RAM, so it may be more cost-effective to buy a new motherboard than try to buy DDR2 RAM.
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No, the ddr3 ram will not be supported on boards which originally supported ddr2. Some people may argue that it is easier to connect a ddr3 ram to a motherboard through a 3.5" drive which is smaller in size, and which might be compatible with the RAM memory Humdinger Use.
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Although DDR3 and DDR2 are both 240Pin modules, they have different electrical designs, operating voltages and memory slots. Therefore, DDR2 and DDR3 cannot work together on the same motherboard
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No, motherboards typically only support one type of RAM, either DDR2 or DDR3, but not both at the same time. Mixing different types of RAM can cause compatibility issues and potentially damage the motherboard and the RAM. It's important to check the motherboard's specifications and only install compatible RAM modules.
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No, motherboards do not support both DDR2 and DDR3 RAM. They are two different types of memory and are not compatible with each other. You will need to purchase a motherboard that is compatible with the DDR3 RAM you wish to use
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No, motherboards cannot support both DDR2 and DDR3 RAM. They are different technologies with different pinouts and voltage requirements. Trying to use DDR2 RAM in a DDR3 motherboard or vice versa will not work and could damage the memory or the motherboard.

There are a few motherboards that have both DDR2 and DDR3 slots, but these are rare and are typically designed for use with older systems that have been upgraded with DDR3 memory. If you are unsure whether your motherboard supports DDR2 or DDR3 RAM, you should consult the motherboard's manual.

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