SitePoint Sponsor

User Tag List

Results 1 to 6 of 6
  1. #1
    SitePoint Member
    Join Date
    Mar 2013
    Posts
    12
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    How to identify a ddr1, ddr2 and ddr3 memory?

    Hey folks,
    I just wanted to know the general way of identifying the ddr, ddr2 and ddr3 memory types. I have to show which are what to others so can't be using cpu-z program. I have to show them externally and there are no label on any of the memory. I know that ddr has 184 pins and ddr2/3 has 240. I found from youtube that there's a mark at the end of the pin. So as I looked through the memory, I saw there was a number 93 written in memory which I told was ddr to some of my friends. And similarly ddr2 had 120 written so I said it was a ddr2 ram. I know its awkward but I need to know. Is there any way to find which memory is which? Thanks in advanced.

  2. #2
    Robert Wellock silver trophybronze trophy xhtmlcoder's Avatar
    Join Date
    Apr 2002
    Location
    A Maze of Twisty Little Passages
    Posts
    6,316
    Mentioned
    60 Post(s)
    Tagged
    0 Thread(s)
    They have key notches in different places. Among the pins is a notch. Looking from the top side, the notch on the DDR2 lies slightly to the right of the middle point of the memory stick. On the DDR3, the notch is slightly to the left of the middle. http://en.wikipedia.org/wiki/File:De...Comparison.svg

  3. #3
    Barefoot on the Moon! silver trophy Force Flow's Avatar
    Join Date
    Jul 2003
    Location
    Northeastern USA
    Posts
    4,615
    Mentioned
    56 Post(s)
    Tagged
    1 Thread(s)
    Notch locations: http://en.wikipedia.org/wiki/File:De...Comparison.svg

    You can usually identify the type of RAM it is by the speed rating on the label, if it doesn't outright say the DDR type.


    DDR: PC-1600 to PC-3200
    DDR2: PC2-3200 to PC2-8500
    DDR3: PC3-6400 to PC3-17000

    If there is no label, you will have to google the model number printed on all of the chips.
    Visit The Blog | Follow On Twitter
    301tool 1.1.5 - URL redirector & shortener (PHP/MySQL)
    Can be hosted on and utilize your own domain

  4. #4
    SitePoint Member
    Join Date
    Mar 2013
    Posts
    12
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    So does it mean that my way of identifying is wrong? I did it because I thought it was way too easy and easy to find out which was which.

  5. #5
    Non-Member
    Join Date
    Mar 2013
    Posts
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    hey the rams have difference in the cuts over the ram that means the notches .It shows the difference over the ram

  6. #6
    SitePoint Member
    Join Date
    Mar 2013
    Posts
    12
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thank you all. Found that ddr1 has written 184 at the end of the pin. 240 is written in ddr2 and ddr3. The way to differentiate ddr2 from ddr3 is the position of notches with ddr2 around the middle and ddr3 with notch more towards one end.


Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •