DDR Memory RAM DDR DIMM and DDR SODIMM Memory RAM


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    DDR2 Memory over DDR Memory?

    Along the way, there has been a push in the DDR manufacturing industry to have the present type of memory run faster, alongside the blazing processor speeds now available in the PC marketplace. The current iteration of DDR has begun to show its' limitations in memory bandwidth with both PC2100/PC2700 DDR platforms. By causing a bottleneck in the performance of these new processor speed demons, memory is starting to be the limiting factor to the question, "how fast can you go?"

    DDR2 introduces some new features which allow it to ramp up to much higher speeds (with correspondingly higher bandwidth) and higher memory densities, all the while using less power. DDR2 memory uses a new form factor, a 240 pin DIMM (Dual Inline Memory Module) which is *not* compatible with current DDR memory slots. Upcoming chipsets by Intel and other manufacturers will support DDR2 specifically, and are not backwards compatible.  

Not sure which DDR memory your system takes? Here are some tools to help you find compatible DDR Memory.

DDR Memory Selector

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DDR SDRAM Memory | DDR2 SDRAM Memory | DDR3 SDRAM Memory

DDR3 is the next-generation, high-performance solution for CPU systems. DDR3 memory are twice as fast as today's highest speed DDR2 memory products. Select your DDR3 Memory from the following.

High-Speed Best Price DDR3 Memory Upgrades


4GB DDR3 1066MHz PC3-8500 204PIN Laptop Memory SODIMM


4GB DDR3 1333MHz PC3-10666 204PIN Laptop Memory SODIMM

2GB DDR3 1066MHz PC3-8500 240PIN Desktop Memory DIMM

4GB DDR3 1066MHz PC3-8500 240PIN Desktop Memory DIMM

4GB DDR3 1333MHz PC3-10666 240PIN Desktop Memory DIMM

4GB DDR3 1333MHz PC3-10666 240PIN ECC Server Memory DIMM




 

Note: DDR2-xxx denotes data transfer rate, and describes raw  DDR chips, whereas  PC2-xxxx denotes theoretical bandwidth (though it is often rounded up or down), and is used to describe assembled DIMMs. Bandwidth is calculated by taking transfers per second and multiplying by eight. This is because DDR2 memory modules transfer data on a bus that is 64 data bits wide, and since a byte comprises 8 bits, this equates to 8 bytes of data per transfer.

Some manufacturers label their DDR2 modules as PC2-4300 instead of PC2-4200, PC2-5400 instead of PC2-5300, and PC2-8600 instead of PC2-8500. At least one manufacturer has reported this reflects successful testing at a higher-than standard data rate,[2] whilst others simply use the alternate rounding as the name, as described above.
 

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