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    Toshiba A100-847 PSAA9E-0R101QAR with 4GB ram but it reads only 3GB on 64bit system

    Discussion in 'Toshiba' started by Dardoush, Jun 6, 2010.

  1. Dardoush

    Dardoush Notebook Enthusiast

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    I have the Toshiba A100-847 PSAA9E-0R101QAR laptop and I have 4GB ram installed on it.
    Yesterday I installed Win7 64-bit system but when I check it on the computer properties I only see:

    Installed Memory (Ram): 4GB (3.00 GB usable)
    System Type: 64-bit Operating System

    What should I do to use my full 4GB ram?
     
    Dardoush, Jun 6, 2010
    #1
  2. mujtaba

    mujtaba ZzzZzz Super Moderator

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    mujtaba, Jun 6, 2010
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  3. Dardoush

    Dardoush Notebook Enthusiast

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    Dardoush, Jun 6, 2010
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  4. serenityconsulting

    serenityconsulting Notebook Consultant

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    I'll add one other possibility. Does your graphics processor share system RAM? If so, there is at least part of your loss.
     
    serenityconsulting, Jun 6, 2010
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  5. Dardoush

    Dardoush Notebook Enthusiast

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    Dardoush, Jun 6, 2010
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  6. mujtaba

    mujtaba ZzzZzz Super Moderator

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    Yes, supposedly it does, but it seems that due to some hardware limitations (some hardware use memory mapping and it seems that bad management of this memory can lead to 1GB being unusable).

    Maybe updating the BIOS will make things better...

    EDIT: serenityconsulting also might be right... What is your graphics card?
     
    mujtaba, Jun 6, 2010
    #6
  7. Dardoush

    Dardoush Notebook Enthusiast

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    My graphics card is Nvidia go-7600 256 MB dedicated
     
    Dardoush, Jun 6, 2010
    #7