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What is the full form of DDR2 SDRAM?

Full form of DDR2 SDRAM: Here, we are going to learn what does DDR2 SDRAM stands for? DDR2 SDRAM – which is an abbreviation of "Double Data Rate 2 Synchronous Dynamic Random-Access Memory" in Computer Acronyms/Abbreviations, etc.
Submitted by Anushree Goswami, on November 23, 2020

DDR2 SDRAM: Double Data Rate 2 Synchronous Dynamic Random-Access Memory

DDR2 SDRAM is an abbreviation of "Double Data Rate 2 Synchronous Dynamic Random-Access Memory". It is a DDR2 SDRAM interface, which taken the place of the original DDR SDRAM and in 2007, gets replaced by the DDR3 SDRAM.

DDR2 SDRAM History

• In 2001, DDR2 SDRAM was originally created by Samsung.
• In 2003, DDR2 SDRAM was publicly launched at two initial clock rates:
  1. 200 MHz (PC2-3200)
  2. 266 MHz (PC2-4200)

DDR2 SDRAM Specifications

• Prefetch length: It is four bits meant for each and every bit in a word in DDR2 SDRAM.
• Bus frequency: It is enhanced by up-gradation in electrical interface, on-die termination, prefetch buffers and off-chip drivers.
• Latency: It may possibly consist of read latencies between three and nine cycles, even if the general usual range is between four and six.
• Power saving: It is attained by DDR2, mainly because of an enhanced manufacturing progression in the course of die shrinkage, which shows outcome in the form of a reduction in operating voltage.
• Capacity: The utmost highest capacity on DDR2 DIMMs, which are publically accessible for commercial purposes, is 8GB, however chipset support and accessibility in case of those DIMMs is very meager and as per DIMM, highly widespread regular 2GB are mostly used.
• Bus speed: DDR2 enables advanced bus speed and contains lesser power by running successively the internal clock at half the speed in comparison to the speed of the data bus.

Reference: DDR2 SDRAM

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