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Added memory but one memory card (Original) not recognised

Original RAM 2*256Mb. I've added 1*512 Mb card and moved original 256 Mb card to third slot. Computer reports only 768 Mb.

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  • hegartya Jan 14, 2009


    1. The computer came with two X 256Mb RAM in slots 0 and 1I have bought one X 512Mb, placed it in slot 0 and moved 256Mb to slot 3. Setup shows Slot 0 and Slot 3 installed, Slots 1 and 3 uninstalled. I moved card in slot 1 to slot 4, but same result. Does this computer require memory to be upgraded with 2 X matched RAM cards?

    2. Compaq Presario SR1460AN

    3. 512Mb - Slot 0
      256Mb - Slot 2
      256Mb - Slot3

    4. Product Number - PW583AA - ABG

  • hegartya Jan 16, 2009

    Beautifully simple, thank you one and all.

  • chris grams
    chris grams May 11, 2010

    Maybe take a look in the bios and try to determine whether the 3rd slot is single or dual channel mode enabled. If there are chips on both sides of the stick, it wants to be dual channel mode enabled. Try and get a motherboard monitor program to let you know a bit more about your memory banks.
    Also, download memtest and do a diagnosis.


  • Wayne Mineard
    Wayne Mineard May 11, 2010

    Could you please give some more information please?



    The exact model number of your computer, especially.



    List the slot labels of each module. (For example 256MB-Slot A1, etc.)



    Model of motherboard may help too. Thanks.

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  • Master
  • 1,901 Answers

OK, according to Crucial.com your RAM does need to be installed in matched pairs.

Here is a link for your computer information:

http://www.crucial.com/store/listparts.aspx?model=Presario%20SR1460AN


If you get another 512MB module and install both pair, it should work well.

Posted on Jan 14, 2009

  • Wayne Mineard
    Wayne Mineard Jan 14, 2009

    Since your original RAM was installed in slots 0 and 1, you can replace them as they were and install the new ones in 2 and 3. Or you can, of course, put the 512MB pair in 0 and 1 and the originals in 2 and 3.

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