DDR2 vs. DDR3

DDR2
DDR3

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.

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DDR2

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DDR2

DDR3

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DDR3
Voltage 1.8 Volts 1.5 Volts
Speed 400 MHz, 533 MHz, 667 MHz, 800 MHz, 1066MT/s 800 Mhz, 1066 Mhz, 1330 Mhz, 1600 Mhz
Modules 240-pin DIMM unbuffered registered; 200-pin SODIMM; 214-pin MicroDIMM 240-pin DIMM (same size as DDR2 but are electrically incompatible with DDR2 DIMMs and have a different key notch location). DDR3 SO-DIMMs have 204 pins.
Prefetch Buffer 4 bits 8 bits

Contents: DDR2 vs DDR3

edit Advantages of DDR3 over DDR2

Modules of DDR2 and DDR3 RAM
Modules of DDR2 and DDR3 RAM

edit Disadvantages of DDR3 compared to DDR2

edit Videos Explaining the Differences

edit Applications of DDR2 vs. DDR3

Graphics cards need fast data transfer between framebuffers. So the higher bandwidth capabilities of DDR3 are useful.

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Comments: DDR2 vs DDR3

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Anonymous comments (1)

April 20, 2014, 9:17pm

Yeah...ddr3 is cheaper because it has become more common...not always better depending on system configuration but is better most all of the time.

— 76.✗.✗.200
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