Facts About DDR Memory

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Double data rate synchronous dynamic random access memory (DDR SDRAM) is a category of computer memory found in Pentium III or higher. DDR RAM, the computer’s primary working memory, belongs to the dual in-line memory module (DIMM) architectural category.

Fact 1. DDR synchronous dynamic RAM doubles the processing rate as opposed to single data rate SDR SDRAM as it is capable of receiving data on both the rising and falling edge of a clock cycle.

Fact 2.  DDR memory, utilized in over 50 percent of all electronic systems, is forecasted to increase to 80 percent as it is suited for designs requiring a high read-to-write ratio.

Fact 3.  DDR memories are used in computer applications and high-speed memory demanding applications such as graphic cards and blade servers.

Fact 4. DDR1, DDR2, and DDR3 memories are powered with 2.5V, 1.8V and 1.5V supply respectively which are more efficient in usage of power compared to single SDRAM chipsets which use a 3.3V supply.

Fact 5.  Memory temporization, a characteristic of  DDR memories, is given a series of numbers such as 2-3-2-6-T1, 3-4-4-8 or 2-2-2-5 for DDR1. The numbers denote the number of clock pulses that are required for memory performance. The smaller the number, the faster the memory.

Fact 6. DDR1 memory with a maximum rated clock of 400 MHz and 64-bit data bus has been taken over by DDR2 and DDR3 due to advances in technology geared  for faster speeds and data rates for RAM memories.

Fact 7. DDR2, introduced in 2003, with a data rate from 400 MHz to 800 MHz is physically incompatible with previous generations of DDR memories.

Fact 8.  DDR3 was  introduced in 2007 with a data transfer rate of  1.6 Gbps at 1.6 GHz and 1.5V voltage level to overtake DDR2.

Fact 9. The disadvantage of DDR memories is the constant need to upgrade hardware due to incompatibility reasons.

Fact 10. The next line of RAM is DDR4 specified with 1.6 giga transfers per second to a maximum of 3.2 giga transfers per second with options open for future upgrades.

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