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The Curious Bag
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Double Data Rate (DDR) memory is an innovation which "double pumps" the memory bus in computers, effectively allowing for more data transfer, doubling the speed at which a computer's RAM operates.
What Does SDRAM Stand For?
SDRAM stands for Synchronous Dynamic Random Access Memory. This merely signifies how it operates. For example, "synchronous" means that it waits for a "tick" of the computer's internal clock before sending or receiving any instructions.
Benefits
DDR2 has the capability of operating at speeds up to twice as fast as its predecessor: DDR. It does this by increasing the possible memory clock rate at which it operates.
Terminology
The way DDR memory gets its name is how it actually transfers data. The memory performs an operation at both the "crest" and "trough" of the clock's "ticks."
What Is DDR2 Compatible With?
Each motherboard is designed for a specific type of memory. For example, motherboards with DDR slots cannot use DDR2 RAM. DDR2 RAM will only be usable in motherboards with the correct memory slots.
Types
There are different types of DDR2, classified by data transfer speed and supported memory clock speed. The fastest kind of DDR2 is DDR2-1066, or PC8600, capable of transferring data at speeds of up to 8533 MB/s if you have a motherboard that supports that memory clock speed.
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