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28 February 2010
22 February 2010
DDR3 RAM Vs DDR2 RAM
DDR3 stands for double-data-rate three and is a random access memory technology used for high speed storage of the working data of a computer or other digital electronic device.
DDR3 is part of the SDRAM (synchronous dynamic random access memory) family of technologies and is one of the many DRAM (dynamic random access memory) implementations.
DDR3 SDRAM is an improvement over its predecessor, DDR2 SDRAM.
The primary benefit of DDR3 is the ability to transfer I/O data at eight times the speed of the memory cells it contains, thus enabling faster bus speeds and higher peak throughput than earlier memory technologies. However, there is no corresponding reduction in latency, which is therefore proportionally higher. In addition, the DDR3 standard allows for chip capacities of 512 megabits to 8 gigabits, effectively enabling a maximum memory module size of 16 gigabytes.
Higher bandwidth performance, effectively up to 1600 MHz: The main benefit of DDR3 comes from the higher bandwidth made possible by DDR3's 8 bit deep prefetch buffer, in contrast to DDR2's 4 bit prefetch buffer or DDR's 2 bit buffer. DDR3 modules can transfer data at the effective clock rate of 800–1600 MHz using both rising and falling edges of a 400–800 MHz I/O clock. In comparison, DDR2's current range of effective data transfer rate is 400–800 MHz using a 200–400 MHz I/O clock, and DDR's range is 200–400 MHz based on a 100–200 MHz I/O clock.
Higher performance at low power (longer battery life in laptops): DDR3 memory promises a power consumption reduction of 30% compared to current commercial DDR2 modules due to DDR3's 1.5 V supply voltage, compared to DDR2's 1.8 V or DDR's 2.5 V.
Price
DDR2 : They are very affordable these days. You can get a 2GB pr a 4GB DDR2 RAM at around $40 and $80 respectively.
DDR3 : They can cost you about as much as double of the DDR2 memories for the same capacity
ProcessorProcessors architecture has to match the memory architecture to take full advantage of it.
DDR2 : They are best suited to Core 2 Duo Systems.
DDR3 : Intel Core i7 Processors are created keeping the DDR3 memory modules in mind. They can take full advantage of it with their similar FSB Speeds with 1333 MHz with 1333 MHz DDR3 Memory.
DDR3 is part of the SDRAM (synchronous dynamic random access memory) family of technologies and is one of the many DRAM (dynamic random access memory) implementations.
DDR3 SDRAM is an improvement over its predecessor, DDR2 SDRAM.
The primary benefit of DDR3 is the ability to transfer I/O data at eight times the speed of the memory cells it contains, thus enabling faster bus speeds and higher peak throughput than earlier memory technologies. However, there is no corresponding reduction in latency, which is therefore proportionally higher. In addition, the DDR3 standard allows for chip capacities of 512 megabits to 8 gigabits, effectively enabling a maximum memory module size of 16 gigabytes.
Higher bandwidth performance, effectively up to 1600 MHz: The main benefit of DDR3 comes from the higher bandwidth made possible by DDR3's 8 bit deep prefetch buffer, in contrast to DDR2's 4 bit prefetch buffer or DDR's 2 bit buffer. DDR3 modules can transfer data at the effective clock rate of 800–1600 MHz using both rising and falling edges of a 400–800 MHz I/O clock. In comparison, DDR2's current range of effective data transfer rate is 400–800 MHz using a 200–400 MHz I/O clock, and DDR's range is 200–400 MHz based on a 100–200 MHz I/O clock.
Higher performance at low power (longer battery life in laptops): DDR3 memory promises a power consumption reduction of 30% compared to current commercial DDR2 modules due to DDR3's 1.5 V supply voltage, compared to DDR2's 1.8 V or DDR's 2.5 V.
Price
DDR2 : They are very affordable these days. You can get a 2GB pr a 4GB DDR2 RAM at around $40 and $80 respectively.
DDR3 : They can cost you about as much as double of the DDR2 memories for the same capacity
ProcessorProcessors architecture has to match the memory architecture to take full advantage of it.
DDR2 : They are best suited to Core 2 Duo Systems.
DDR3 : Intel Core i7 Processors are created keeping the DDR3 memory modules in mind. They can take full advantage of it with their similar FSB Speeds with 1333 MHz with 1333 MHz DDR3 Memory.
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