Just installed 2 more Gigs of RAM and SBS only shows 3.25 out of 4 Gigs total

Discussion in 'Windows Small Business Server' started by John, Oct 20, 2006.

  1. John

    John Guest

    I am running a Dell 1800 with 2 gigs of RAM. I added 2 more last night and
    the SBS2k3 only shows 3.25 gigs now. I checked the BIOS and it shows 4
    gigs. I also ran a Belarc just for kicks and it shows all 4 sticks.

    I thought that perhaps I had modified the boot.ini with the /3 gig switch
    but I did not.


    Any ideas?


    Thanks


    John
     
    John, Oct 20, 2006
    #1
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  2. John

    Al Williams Guest

    Most motherboards will not allow the entire 4GB to be used as they use a lot
    of the upper memory for peripherals, etc. It has to do with the MB
    chipsets, 32 bit OS, etc. - check the MB manual.

    You may want to read the "RAM limits" post from the 17th as well.
     
    Al Williams, Oct 20, 2006
    #2
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  3. John

    John Guest

    Thanks Allan.

    I will call Dell and see what I find out.

    John
     
    John, Oct 20, 2006
    #3
  4. John

    John Guest

    OK so the official answer from Dell is that just like on cheap motherboards
    they are doing shared memory. So approx 500 megs of RAM is being allocated
    to internal systems.


    Nice..... :-(


    John
     
    John, Oct 20, 2006
    #4
  5. Dave Nickason [SBS MVP], Oct 20, 2006
    #5
  6. That sounds like horse pucky. I've got a 2800 with 4 GB and it shows all 4.
    I don't think the two servers are that much different.

    Is you BIOS current? And see my other post about PAE.
     
    Dave Nickason [SBS MVP], Oct 20, 2006
    #6
  7. John

    Steve Guest

    Dave-

    We just went over this in the SBS2K Yahoo group and both Steve Foster and
    Super Gumby say not to use the /pae switch with SBS 2003.

    Steve
     
    Steve, Oct 20, 2006
    #7
  8. Yeah, but when I read The Old New Thing, I listen. I was not aware of this
    article.

    It would seem that on systems where all 4GB is visible to the OS the /PAE is
    not applicable but those systems displaying <4GB may require it (and from
    some of the comment experience problems anyway). I'll drop the link onto the
    list, look forward to more discussion.
     
    SuperGumby [SBS MVP], Oct 20, 2006
    #8
  9. I wouldn't argue with those guys (generally a losing proposition anyway),
    but based on that blog post, it'd be interesting to see if PAE is enabled on
    the OP's server or not.

    This is interesting - on my relatively new SBS with 4 GB ram, Physical
    Address Extension is enabled. Recent member server with 2 GB, it's enabled.
    3-yr. old member server with 2 GB, it's not. This XP desktop with 512 MB,
    it is. I never did anything whatsoever to enable or disable it on any of
    these boxes, so it's set however the Windows installer sets it by default.
    (On the SBS and new member server, I did the OS installs. The older member
    server and XP were OEM).
     
    Dave Nickason [SBS MVP], Oct 20, 2006
    #9
  10. Haha. My SBS 4 box had 64 MB and I thought that really rocked. It had
    mirrored ~4 GB SCSI drives that held everything including Exchange. That
    box might still be around here somewhere (upgraded to 4.5), and I'll bet it
    still runs fine.

    My first desktop had 8 MB, and I lived in fear that a co-worker would steal
    half of it. That one had a 120 mb hard drive that was a source of envy as
    well.
     
    Dave Nickason [SBS MVP], Oct 20, 2006
    #10
  11. John

    Al Williams Guest

    So from what I'm reading it is the old 640K limit all over again, except
    this time we are at 4GB ;-)

    Adding /PAE may work but it depends upons whether your motherboard supports
    it. There may also be driver compatibility issues with PAE.

    Note - if the MB has built-in in video then additional RAM is always taken
    by the video card regardless of how much total RAM you have (how much may be
    configurable in the video/color depth settings). This is not related to the
    4GB problem, just a fact of life with on-board video.
     
    Al Williams, Oct 20, 2006
    #11
  12. Hi John,

    Thanks for posting here.

    Based on my research, you can use the PAE parameter in boot.ini to reach
    this goal, the PAE is a function of the Windows 2000 and Windows Server
    2003 memory managers that provides more physical memory to a program that
    requests memory.

    For more information, please refer to the following knowledge base article:

    Large memory support is available in Windows 2000 and Windows Server 2003
    http://support.microsoft.com/default.aspx?kbid=283037

    I hope the above information helps.

    Have a nice day.

    Best Regards,

    Steven Zhu
    MCSE
    Microsoft Online Partner Support
    Get Secure! - www.microsoft.com/security
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    Steven Zhu [MSFT], Oct 23, 2006
    #12
  13. John

    John Guest

    Spoke with Dell and sure enough my system wants to use the 700+ megs of RAM
    as shared.

    I will look into the PAE switch and get back to the group.



    John
     
    John, Oct 25, 2006
    #13
  14. Hi John,

    Thanks for your reply.

    I will look forward to hearing from your.

    Have a good day.

    Best Regards,

    Steven Zhu
    MCSE
    Microsoft Online Partner Support
    Get Secure! - www.microsoft.com/security
    ======================================================
    PLEASE NOTE the newsgroup SECURE CODE and PASSWORD were
    updated on February 14, 2006.? Please complete a re-registration process
    by entering the secure code mmpng06 when prompted. Once you have
    entered the secure code mmpng06, you will be able to update your profile
    and access the partner newsgroups.
    ======================================================
    When responding to posts, please "Reply to Group" via your newsreader so
    that others may learn and benefit from this issue.
    ======================================================
    This posting is provided "AS IS" with no warranties, and confers no rights.
    ======================================================
     
    Steven Zhu [MSFT], Oct 26, 2006
    #14
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