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    4GB ram on HP 6910p only 3GB used

    Discussion in 'HP' started by obionenairobi, Jan 20, 2008.

  1. obionenairobi

    obionenairobi Notebook Consultant

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    Hi,

    I bought a 6910p and installed 4GB of RAM.
    When I right click my computer I see that only 2,99 GB is used.

    I thought that XP pro could handle the 4 GB ???

    Anyone have an idea ?
     
    obionenairobi, Jan 20, 2008
    #1
  2. miner

    miner Notebook Nobel Laureate

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    You will need 64bit version of XP Pro. 32bit versions can only access ~3GB RAM.
     
    miner, Jan 20, 2008
    #2
  3. mp3lll

    mp3lll Notebook Enthusiast

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    mp3lll, Jan 20, 2008
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  4. obionenairobi

    obionenairobi Notebook Consultant

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    and does this also work on XP pro ?

    On the site to which you link there is only mention of XP or WIN 2003 server
     
    obionenairobi, Jan 20, 2008
    #4
  5. schoko

    schoko Custom User Title

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    yes you could do that, but if you force the physical adress emulation, your 32 bit windows will most likely become slower.

    there are quite some articles all over the net concerning the benefits and problems concerning the PAE.
    i recommend you not to use it.

    but maybe you should google it and make your own picture.
     
    schoko, Jan 20, 2008
    #5
  6. kanehi

    kanehi Notebook Deity

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    The /pae only works with Intel chips. XP Pro Server can access 4gb RAM
     
    kanehi, Jan 20, 2008
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  7. Greg

    Greg Notebook Nobel Laureate

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    PAE was partially/permanently disabled by Microsoft after they discovered some severe driver problems with some computers. All 4GB will never be available.
     
    Greg, Jan 20, 2008
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  8. mathewsmt

    mathewsmt Notebook Enthusiast

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    hey i have dv6500t with 4gb of ram and vista ultimate... will the 'BCDEdit /set PAE forceenable' work for me
     
    mathewsmt, Jan 21, 2008
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  9. Jay07

    Jay07 Notebook Consultant

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    I received my HP with XP Media Center but have XP Professional 64. Are you saying that if I installed XP Pro 64 I can utilize 4GB of RAM?
    I do like media center though and the buttons that are on my hp, is there anyway to get 4gb of RAM working with mce?
     
    Jay07, Jan 21, 2008
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  10. obionenairobi

    obionenairobi Notebook Consultant

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    so if I use the above command and notice that it slows down my system, is there also a way to revert it back to current settings ?
     
    obionenairobi, Jan 22, 2008
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  11. Greg

    Greg Notebook Nobel Laureate

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    PAE is not going to help anyone. See my post above. It does not matter what version of Vista you have if it is 32bit. 64bit Vista does not need anything extra to use 4GB of RAM.
     
    Greg, Jan 22, 2008
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  12. orev

    orev Notebook Virtuoso

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    As already stated, this will not give you a stable system. Performance is not the only problem, it is also that all drivers need to be written to support it. Since PAE is only intended to be used on servers, almost no drivers will work correctly on a laptop.

    No. You will need Vista 64 bit.

    Your sig has a dv6000. If that's the machine, then no, it will not. The dv6000 has a 945 chipset, which is 32bit only and will not be able to access 4GB of RAM. 3GB is the best you can get.
     
    orev, Jan 22, 2008
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  13. nfsuw

    nfsuw Notebook Enthusiast

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    just wondering what you mean by the 945 chipset only supporting 32bit. i have the 945 chipset, and i have support for 64bit. i even run 64bit linux and vista 64bit.
     
    nfsuw, Jan 22, 2008
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  14. orev

    orev Notebook Virtuoso

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    But how much RAM? If you have more then 3GB, you will not be able to use all of it. Some BIOSes will report that they can see all 4 GB, but you cannot actually access it.
     
    orev, Jan 22, 2008
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  15. m_hael

    m_hael Notebook Enthusiast

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    its a simple thing.

    with a 32bit system the total address space of the entire system is 4Gb (1MB = 20bits, 1Gb = 30Bits, 4Gb = 32bits), this is shared with ALL devices including video cards, network cards...everything.

    that range is thus reduced by the other elements in the system such that for most people around 3.25Gb is accessible, I believe the rest of the limitation is windows simplifying things.

    with a 64bit system the 4Gb limit does not exist.

    the PAE system forces a "compatibility mode" for all address space - it is not hardware supported for the most part and thus... slow. Further to that it is somewhat buggy.
     
    m_hael, Jan 23, 2008
    #15