3GB Switch


  1. Posts : 5
    Windows 7 x64
       #1

    3GB Switch


    I Have Windows 7 RC Build 7100 32 bit. I've been playing Fallout 3 A lot recently and been adding many many mods. It seems however, I've added so many that it needs more memory than the application is normally able to address. I have a utility which will allow it to use more RAM, however i need to enable the 3 GB switch for this to work. I know on Vista the command was "bcdedit /set IncreaseUserVa 3072" However this is apparently not the case in Windows 7. Any Thoughts? Anyone know how to enable this change in Windows 7?
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  2. Posts : 201
    Windows 7 64bit
       #2

    You need the exe. BCDEDIT.EXE /Set IncreaseUserVa <value>
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  3. Posts : 5
    Windows 7 x64
    Thread Starter
       #3

    No Go.

    "The element data type specified is not recognized, or does not apply to the specified entry. Run 'bcdedit /?' for command line assistance. Element not found."

    Any more thoughts?
    Thanks for the quick response
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  4. Posts : 5,642
    Windows 10 Pro (x64)
       #4

    It is increaseuserva, something must be entered wrong.
    http://msdn.microsoft.com/en-us/library/aa906211.aspx
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  5. Posts : 1,377
    Win7x64
       #5

    Calhoun said:
    I Have Windows 7 RC Build 7100 32 bit. I've been playing Fallout 3 A lot recently and been adding many many mods. It seems however, I've added so many that it needs more memory than the application is normally able to address. I have a utility which will allow it to use more RAM, however i need to enable the 3 GB switch for this to work. I know on Vista the command was "bcdedit /set IncreaseUserVa 3072" However this is apparently not the case in Windows 7. Any Thoughts? Anyone know how to enable this change in Windows 7?
    Are you quite sure that Fallout3 is able to access the extra memory (is it LARGEADDRESSAWARE [LAA])? If not, bumping up the userVA setting will slow down your OS a little for no gain at all, since the Fallout3 process will still limit itself to ~1.9GB tops.

    As an aside, if Fallout3 really is LAA, if you run it under x64 Windows it'll be able to allocate up to 4GB for itself.
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  6. Posts : 5
    Windows 7 x64
    Thread Starter
       #6

    I am sure, because the memory limitation problems persist even when the utility is applied.
    I am running the 32-bit version though, so i have to change the setting. I have been thinking about updating to the 64-bit RTM version. As an aside, Is it possible to install the 64-bit version of the RTM over my current version?


    It was correct. I was making a spelling mistake. (Duh, I sure feel stupid)
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  7. Posts : 1,377
    Win7x64
       #7

    Calhoun said:
    I am sure, because the memory limitation problems persist even when the utility is applied.
    I am running the 32-bit version though, so i have to change the setting. I have been thinking about updating to the 64-bit RTM version. As an aside, Is it possible to install the 64-bit version of the RTM over my current version?


    It was correct. I was making a spelling mistake. (Duh, I sure feel stupid)
    Interesting. It's the first LAA game I've heard of, but then it's been some years since I've played games :)

    Since it's LAA, the same game will be able to allocate up to 4GB for itself once its running under 64-bit Windows, without requiring you to change any settings. You can't "upgrade" to 64-bit though - it needs to be a clean install.
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  8. Posts : 5
    Windows 7 x64
    Thread Starter
       #8

    Yeah, And it's running better than ever. Increased Frame rates, less stutter. As Far as general performance i haven't noticed any real decrease.

    I figured as much, Which means i probably won't be switching to a 64-bit OS for awhile.
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  9. Posts : 52
    Windows 7 - x64 Professional
       #9

    Bringing up and older post here but hoping I can find some assistance. I have Win 7 32 bit, currently with 3GB RAM and 8800GTX 768MB graphics card. In FSX (Flight Sim) I also get an out of memory error on occasion. It seems the "/3GB" switch is a solution but I cannot find a step by step guide to do this.
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  10. Posts : 5
    Windows 7 x64
    Thread Starter
       #10

    Wow, Old Thread is OLD!
    The above command should work, however FSX also needs to be set up to LAA (Large Adress Aware) otherwise you will see not benefit.
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