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4Gb Memory in Windows XP

Pim Janswaard
Hello,

I added memory to our Win XP machine so in total it's got 4Gb installed.

I had to add the /3Gb command to my boot.ini file so Windows understands the amount of memory. After rebooting CO 4.1 / P45+ tethered did not work anymore... after removing the /3GB command it worked again....

Anyone?
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Comments

5 comments

Date Votes
  • Paul Steunebrink
    The /3GB command in boot.ini 'sometimes' works but is putting heavy strain on compatibility. It allows more virtual memory to applications (3 instead of 2, in contrast to what they expect) and less to Wlindows (1 instead of 2, what might not be suffiicient to perform all tasks). Problem remains that WinXP (32-bits) is still limited to approx 3.5 GB (it does not use all 4 GB) with or without the switch.

    But what did you expect to gain with the switch after all? CO4 is not a memory hog in that you need much RAM for the application pool. Did you monitor Task Manager while working with CO4.1 / P45 tethered and did you run out of physical memory?

    It that is really the case, which I doubt humble speaking, than switching to a 64-bit OS might be a much better option assuming that a) you have the proper hardware (processor/BIOS) to support that and b) CO4/Phase One databacks work tethered in a 64-bit OS. The problem here is that Phase One does not explicitly mention 32- or 64-bit Windows support in their release notes. CO4 works however on 64-bit Windows, but tethered operation is a different story.
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  • Pim Janswaard
    We use the machine also for Photoshop, then 1 extra Gb of memory comes in handy...
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  • thowi
    [quote="Cameron Studio" wrote:
    I added memory to our Win XP machine so in total it's got 4Gb installed. I had to add the /3Gb command to my boot.ini file so Windows understands the amount of memory. After rebooting CO 4.1 / P45+ tethered did not work anymore... after removing the /3GB command it worked again....

    Try this entry: /3GB /USERVA=2990
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  • Phil Hawkins
    [quote="Paul_E" wrote:

    The problem here is that Phase One does not explicitly mention 32- or 64-bit Windows support in their release notes. CO4 works however on 64-bit Windows, but tethered operation is a different story.


    WHY do the release notes NOT mention one word about 32 bit Vista or 64 bit Vista??? And I am confused; will C1 4.5 run on Vista 64bit or not? And if so, does it gain better performance?
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  • Paul Steunebrink
    [quote="Phil" wrote:
    [quote="Paul_E" wrote:

    The problem here is that Phase One does not explicitly mention 32- or 64-bit Windows support in their release notes. CO4 works however on 64-bit Windows, but tethered operation is a different story.


    WHY do the release notes NOT mention one word about 32 bit Vista or 64 bit Vista??? And I am confused; will C1 4.5 run on Vista 64bit or not? And if so, does it gain better performance?

    It appears to be 64-bit time again this time of year 😉 . Please see my notes in the other thread.
    viewtopic.php?p=26609#p26609
    I also asked Phase One again to be more specific on x64 support of CO4.x in the release notes.
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