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How does GPU-Z calculate video card memory

Discussion in 'GPU-Z' started by DavidPryce, Nov 13, 2008.

  1. DavidPryce New Member

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    Hi Forum,

    I have two Nvidia video cards in my PC and for some reason both WINMSD and WMI report the on board memory incorrectly.

    Card 1 has 512MB and Card 2 had 256 MB.

    WINMSD and WMI report the card 1 as 256MB and card 2 as 512MB.

    GPU-Z correctly reports the memory on both cards.

    How does GPU-Z detect the memory?

    Via device IO control or from register or other?

    Thanks

    David
  2. DanTheBanjoman SeƱor Moderator

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    It reads it directory from the GPU registers via its driver. I have the same issue at work, WMI reads it wrong and I'd guess WINMSD reads it via WMI. Though since we only use a few machines I base video memory on laptop model, simple lookup table.
  3. DavidPryce New Member

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    Hi Forum,

    Thanks for clarifying that.

    I think the registry entries on my PC are also wrong.

    Is there any further information exactly how this is done as I would like to display the correct VRAM inside my program.

    Particularly for NVIDA cards.

    Thanks

    David
  4. RadeonX2

    RadeonX2 New Member

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    I think everest displays correct info on almost every piece of hardware inside your system
  5. W1zzard

    W1zzard Administrator Staff Member

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    gpu memory size is read via register from the gpu

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