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Help please composing new Boot.ini file

By forbesie
Nov 8, 2007
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  1. Hi,
    It has been suggested to add a 3G/switch to my Boot.ini file for improving AutoCAD 2008 performance. My research has shown that I could really stuff my PC up if I don't do it right. One site recommends having a second instance of the OS line...
    Their example:

    [boot loader]
    timeout=30
    default=multi(0)disk(0)rdisk(0)partition(1)\WINDOWS [operating systems]
    multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Pro"
    multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Pro with /3GB" /3GB

    If there is a stuff up I will get back into my PC to correct things.
    Here's where I need help!

    This is my Boot.ini

    [boot loader]
    timeout=30
    default=multi(0)disk(0)rdisk(0)partition(1)\WINDOWS
    [operating systems]
    multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional" /fastdetect /NoExecute=OptIn

    Would some whiz be able to write it so that I have a second instance of OS.
    As mine is different to the example I'm not sure how to do it.
    Appreciate your help.
     
  2. Po`Girl

    Po`Girl TS Rookie Posts: 668

    Hi,

    Before you do this,read THIS page,carefully.

    The boot ini you need is -

    Code:
    [boot loader]
    timeout=30
    default=multi(0)disk(0)rdisk(0)partition(1)\WINDOWS
    [operating systems]
    multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional" /fastdetect /NoExecute=OptIn
    multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="XP full 3GB setting" /3GB /fastdetect /NoExecute=OptIn

    Also the first time you reboot to the 3GB mode immediately go the the My Computer properties/Advanced tab/ Settings/ Advanced tab

    and change the maximum amount of virtual memory to 4 GB. This is part of the microsoft requirements.
     
  3. forbesie

    forbesie TS Rookie Topic Starter

    Thanks for your help Po. Did it and it's OK. One further question. I have 2.5Gb of memory and it's recommended elsewhere that the virtual memory be set at 3 x physical memory = 7.5Gb. Should I still reduce it to the 4Gb for some reason?
    Kind regards
     
  4. Po`Girl

    Po`Girl TS Rookie Posts: 668

    From what I understand,the /3G switch will give 3Gb to the application

    and 1Gb to the Kernel.

    Windows 32 bit won`t address more than 4 Gb of virtual memory.More HERE
     
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