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  4. How to make windows xp access 4GB of memory??

How to make windows xp access 4GB of memory??

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    pavanbabut
    wrote on last edited by
    #1

    Hi, I have installed 4GB of memory in my system and windows xp is recognising only 3GB of it. How can I make it to recognise and use the full 4GB?? -Pavan

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    • P pavanbabut

      Hi, I have installed 4GB of memory in my system and windows xp is recognising only 3GB of it. How can I make it to recognise and use the full 4GB?? -Pavan

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      Lost User
      wrote on last edited by
      #2

      pavanbabut wrote:

      I have installed 4GB of memory in my system and windows xp is recognising only 3GB of it.

      As far as I know, windows xp recognize 4gb as the maximum memory. In my opinion, the reason that your memory see only 3Gb because you might share your memory with your VGA card or other device that need to share with this memory. Check your computer CMOS for more information.

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      • L Lost User

        pavanbabut wrote:

        I have installed 4GB of memory in my system and windows xp is recognising only 3GB of it.

        As far as I know, windows xp recognize 4gb as the maximum memory. In my opinion, the reason that your memory see only 3Gb because you might share your memory with your VGA card or other device that need to share with this memory. Check your computer CMOS for more information.

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        pavanbabut
        wrote on last edited by
        #3

        But do ya think that for video and peripherals ROM, it takes 1GB?? I am sure that I have allocated 256MB of RAM to one of my framegrabber card and my graphics card is having on board memory of 256MB. I read a lot on PAE and /3GB options in windows and I tried all those with no luck. -Pavan

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        • P pavanbabut

          Hi, I have installed 4GB of memory in my system and windows xp is recognising only 3GB of it. How can I make it to recognise and use the full 4GB?? -Pavan

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          Dave Kreskowiak
          wrote on last edited by
          #4

          User applications under XP can only use a max of 3GB. The remaining 1GB is reserved for the Windows kernel.

          Dave Kreskowiak Microsoft MVP - Visual Basic

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          • D Dave Kreskowiak

            User applications under XP can only use a max of 3GB. The remaining 1GB is reserved for the Windows kernel.

            Dave Kreskowiak Microsoft MVP - Visual Basic

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            Sebastian Schneider
            wrote on last edited by
            #5

            Isn't that area reserved for PCI? AFAIR, that is why the area is "hidden" by Windows: The kernel protecting the PCI addresses. If I am mistaken, please give me some feedback.

            Cheers, Sebastian -- Contra vim mortem non est medicamen in hortem.

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            • S Sebastian Schneider

              Isn't that area reserved for PCI? AFAIR, that is why the area is "hidden" by Windows: The kernel protecting the PCI addresses. If I am mistaken, please give me some feedback.

              Cheers, Sebastian -- Contra vim mortem non est medicamen in hortem.

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              Dan Neely
              wrote on last edited by
              #6

              PCI, AGP, IO ports. Basically any hardware that uses memory mapping to access it's buffers is stuffed in the >3gig range of memory. If you need more than 3gigs you need to get a 64bit cpu and os.

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              • P pavanbabut

                Hi, I have installed 4GB of memory in my system and windows xp is recognising only 3GB of it. How can I make it to recognise and use the full 4GB?? -Pavan

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                David Crow
                wrote on last edited by
                #7

                See these past threads: http://www.codeproject.com/lounge.asp?msg=1715374&stype=1#xx1715374xx[^] http://www.codeproject.com/lounge.asp?msg=1719788&stype=1#xx1719788xx[^]


                "Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

                "Judge not by the eye but by the heart." - Native American Proverb

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