Computer Hope

Hardware => Hardware => Topic started by: Flip81 on January 16, 2008, 10:11:45 PM

Title: DDR1 vs. DDR2
Post by: Flip81 on January 16, 2008, 10:11:45 PM

I understand the differences for the most part.  That is, DDR2 uses a 4-bit prefetch versus DDR1's 2.  Data rate begins at 400-667 for DDR2 versus DDR1 ends at 400, and etc, etc...

my questions is:  Is there a definitive VISIBLE difference in the two?  Is there a hole or notch in the side or on the pins that makes it easy to differentiate?

thanks!

Title: Re: DDR1 vs. DDR2
Post by: quaxo on January 16, 2008, 10:38:04 PM

DDR is 184 pins. DDR2 is 240 pins. Each has a single notch, but it's located in a different place on each type.

Wikipedia has a page for each type, including descriptions of the physical differences.
http://en.wikipedia.org/wiki/DDR_SDRAM (http://en.wikipedia.org/wiki/DDR_SDRAM)
http://en.wikipedia.org/wiki/DDR2 (http://en.wikipedia.org/wiki/DDR2)