DDR2 vs. 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.

The primary benefit of DDR3 is the ability to transfer data for I/O at 8 times the speed of its memory cells, thereby enabling faster bus speeds and higher peak throughput than earlier DRAM memory technologies. However, there is no corresponding reduction in latency, which is therefore proportionately higher. In addition, the DDR3 standard allows for chip capacities of 512Mb to 8 Gb, effectively enabling a maximum memory module size of 16 GB.

Comparison chart

Edit this comparison chart


User Rating (220):


User Rating (154):
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

edit Disadvantages of DDR3 compared to DDR2

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

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.

edit References

Share this comparison:

If you read this far, you should follow us:

"DDR2 vs DDR3." Diffen.com. Diffen LLC, n.d. Web. 21 May 2015. < >

Related Comparisons Follow Diffen
Top 5 Comparisons
Make Diffen Smarter.

Log in to edit comparisons or create new comparisons in your area of expertise!

Sign up »

Comments: DDR2 vs DDR3

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


Up next