Integrated video and RAM > 3 GB under Win 32-bit issue

Discussion in 'Hardware' started by Art, Nov 30, 2008.

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  1. Kir

    Kir Pen Pal - Newbie

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    Hi all!

    Does anyone have an experience of using more than 3 GB RAM under 32-bit Windows (Vista or XP) with integrated video?

    32-bit Windows can only "see" ~3 GB of RAM. If my system has 4 GB can integrated video use that odd 1 GB which is invisible for Windows?

    Thanks!
     
  2. DRTigerlilly

    DRTigerlilly Tablet Lead Mod (Retired) Senior Member

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    this isn't an issue, 32 bit windows doesn't support more than 3.2gb - 3.5gb, if you want to utilize all 4gb you need a 64 bit copy of the OS.
     
  3. Kir

    Kir Pen Pal - Newbie

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    It's clear. :)
    But as I know integrated video interact with shared RAM directly without CPU participation. So there must be no difference between 32 and 64 mode in this aspect. Thus video can utilize part of memory above 3.2 GB. Isn't it?

    Strictly speaking the theory is good, but practice is best. ;) I'm very interested to hear comment from someone who has machine with 32-bit Windows, integrated video and 4+ GB of system RAM. Does such system have all 3.2 GB of RAM or "3.2 minus videomemory_size"?
     
  4. newsposter

    newsposter E295C + a pile of gadgets

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    The driver for the video chip comes in with windows.

    Don't confuse the capabilities of a pci-e memory card and it's built-in vram with a video chip wired into a notebook motherboard and controlled by the host o/s.
     
  5. Andresin

    Andresin Pen Pal - Newbie

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    Kir: I'm wondering the exact same thing. 32 bit Vista reprts using only 3.2~5 but if you have an integrated graphics card that uses system RAM for graphics does that RAM get counted twice or is it actually using som of that "unused RAM"?
     
  6. MadCow

    MadCow Pen Pal - Newbie

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    Most likely Windows will only see 3.5gb, then the graphics card will claim some more from that amount.

    Back in the old days you could set the amount of memory the graphics card uses in the BIOS, so the hardware would claim that amount before Windows. However, I think most of the current GPUs no longer work this way anymore.
     
  7. Kir

    Kir Pen Pal - Newbie

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    Hmm... Good thoughts. Thank you for it! But please somebody give us some facts! :)
     
  8. newsposter

    newsposter E295C + a pile of gadgets

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    Define 'fact'.

    Is it something you can believe in or something that is true?
     
  9. Kir

    Kir Pen Pal - Newbie

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    In this case it is just an explanation of the practical experience.
     
  10. Art

    Art Scribbler - Standard Member

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    I've got 4GB RAM in my TX2550ea with 32bit Vista.

    Vista reports a full 4GB installed. A little digging in DxDiag says that the system itself is running on 2812MB and that the graphics chip has 1460MB all to itself. I haven't done any fiddling with the system settings, I just opened up the machine and slotted in the new RAM, so that's whatever the system has decided is best for itself. I'm not sure if you can tweak the amount assigned to each part, I've never been bothered to try to find out.
     
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