4gb showing in Sys Info but only 2gb showing in Task Manager

Discussion in 'Windows Vista General Discussion' started by Newton, May 18, 2008.

  1. Newton

    Newton Guest


    I just installed an additional 2gb of RAM on my system, but this is not
    showing in the Task Manager. It iniitally was not showing in either, but
    after installing SP1 Sys info was updated. Please help.

    680i SLI Mobo
    2 X 8800GT 512mb
    Quad Core Q6600
    Vista 32bit
    4gb - OCZ Sli ready RAM - 1066mhz (DDR2)
    Newton, May 18, 2008
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  2. Newton

    Ian D Guest

    Is memory remapping enabled in the BIOS? If so, disable it. Memory
    remapping is only for 64 bit OSs, to move the hardware addressing
    to above the highest physical memory. I have found that enabling
    memory remapping for XP or Vista 32 drops the useable (Task
    Manager reported) memory to 2GB.
    Ian D, May 18, 2008
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  3. Newton

    Netty Guest

    But doesn't Vista 32bit only use a max of 3GB of RAM anyway?

    Netty, May 18, 2008
  4. Newton

    Ian D Guest

    Vista 32 bit and XP 32 bit have access to 4 GB of virtual address
    space. Of that, 500 MB to about 900 MB is reserved for hardware
    addressing. The biggest user is PCIe video cards, as the video RAM
    is mapped into the addressing space. What's left, usually 3.1 - 3.5 GB,
    is available to Windows. Each running application has its own 4 GB
    of virtual addressing space subject to the above limitation, and the
    virtual addresses are mapped into available physical RAM as required.
    This allows concurrently running applications to use the same memory
    space addresses, but different physical RAM addresses.
    Ian D, May 18, 2008
  5. Newton

    FXFire Guest

    Ian D

    I did this whole 'disabling of memory remapping' thing as I am doing the
    same thing as the author of this post was doing. I have found that it indeed
    raises the amount that XP32 registers, however, it caused a serious crash in
    my system when I attempted to run anything stressful to the RAM (Call of Duty
    4 for example). I actually got the blue screen of death a couple of times. I
    re-enabled mapping, and the problem went away.

    My question is. Does this have anything to do with my having an SLi video
    cards sucking up 1gb of Video RAM? Even so, my mobo can handle up to 8gb of
    RAM. Could it be that my RAM sticks are conflicting with one another (2 are
    Patriot brand, and 2 are G.Skill)??? Not sure if what to do here. I've listed
    some of my system specs below.

    Asus P5N32SLI SE Deluxe 2.02 G Mobo
    Core 2 Duo 2.13ghz E6400 4M Cache 1066mhz
    EVGA Nvidia GeForce 7950 GX2 1gb
    2gb DDR2 PC-6400 (Patriot)
    *RAM addition = 2gb DDR2 PC-6400 (G.Skill)*

    The RAM says the timings are the same, but I'm not sure about the older
    Patriot RAM, as many have said they have issues with it.

    Any help would be greatly appreciated. Thanks ahead of time.
    FXFire, May 20, 2008
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