Why is only half of my RAM usable?

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  1. Posts : 64
    Windows 7 Ultimate x64
       #1

    Why is only half of my RAM usable?


    I have performance problems. Even though I have 4GB RAM installed physically, my harddisk runs like crazy. A moment ago, I encountered the system report below, which says that only 2GB of my RAM is usable.

    What is the meaning of this?

    Here is the screenshot:
      My Computer


  2. Posts : 8,383
    Windows 10 Pro x64, Arch Linux
       #2

    Uncheck Max mem from msconfig (Windows Key+R>msconfig>Boot>Advanced options)

    Post a screen shot of the Memory Tab in Resource Monitor
    You can view this in Resource Monitor. Start > type "resource" > Open Resource Monitor > Memory Tab > Physical Memory.

    Enable memory remap in your BIOS if it is supported
      My Computer


  3. Posts : 64
    Windows 7 Ultimate x64
    Thread Starter
       #3

    yowanvista said:
    Uncheck Max mem from msconfig (Windows Key+R>msconfig>Boot>Advanced options)
    It is already unchecked.

    yowanvista said:
    Post a screen shot of the Memory Tab in Resource Monitor
    You can view this in Resource Monitor. Start > type "resource" > Open Resource Monitor > Memory Tab > Physical Memory.


    yowanvista said:
    Enable memory remap in your BIOS if it is supported
    I'm editing BIOS now...
      My Computer


  4. Posts : 8,383
    Windows 10 Pro x64, Arch Linux
       #4

    2053MB of your RAM is allocated to the hardware, probably to your Radeon HD4670. That amount cannot be used at all. But if you want more memory just add more RAM
      My Computer


  5. Posts : 17,796
    Windows 10, Home Clean Install
       #5

    Just to be sure that your memory is not having problems (I tend to agree with yowanavista), take memtest86
    Guide to using Memtest86+ - Geeks to Go Forums
      My Computer


  6. Posts : 6,879
    Win 7 Ultimate x64
       #6

    Some things to try here,

    Asus X58 + 6/12GB memory overclocking - detecting less memory than installed - i4memory.com - different look at memory

    2053MB of your RAM is allocated to the hardware, probably to your Radeon HD4670.
    Unless there is a major hardware glitch somewhere, no it isn't.
      My Computer


  7. Posts : 26,863
    Windows 11 Pro
       #7

    The 4670 should have it's own memory. there may be a bios setting to turn off dedicated graphics memory.
      My Computer


  8. Posts : 64
    Windows 7 Ultimate x64
    Thread Starter
       #8

    My problem is solved after taking RAM out of its socket and then replugging it. I think there was a physical disconnection in the RAM socket. Now my system works fine.
      My Computer


  9. Posts : 1,653
    Windows 10 Pro. EFI boot partition, full EFI boot
       #9

    essenbe said:
    The 4670 should have it's own memory. there may be a bios setting to turn off dedicated graphics memory.
    Doesn't matter if it has its own memory. It will need PCI-e address space and will map to the upper part of the 4GB unless memory remapping is available and enabled. It doesn't need physical memory but it does need address space, which it will take away from that being used by physical RAM.

    That is a huge amount of reserved ddress space though. Did you move your graphics card from one PCI-E slot to another?
      My Computer


  10. Posts : 2,752
    Windows 7 Pro x64 (1), Win7 Pro X64 (2)
       #10

    GeneO said:
    essenbe said:
    The 4670 should have it's own memory. there may be a bios setting to turn off dedicated graphics memory.
    Doesn't matter if it has its own memory. It will need PCI-e address space and will map to the upper part of the 4GB unless memory remapping is available and enabled. It doesn't need physical memory but it does need address space, which it will take away from that being used by physical RAM.
    Just in passing, I have a 512MB HD4670 card in my ASUS P5Q3 motherboard, and it takes zero memory from my 4GB of RAM.

      My Computer


 
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