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Graphic Memory Utilization


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It's not that straightforward, since detecting video memory size and detecting used memory works very differently. And when a video adapter uses off-board memory as well (UMA, HyperMemory, TurboCache, etc), then the video memory size detected by AIDA64 may not equal to the actual total video memory available for the GPU.

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Could you explain what do all of the following parameters mean:

GPU Used Dedicated Memory,

GPU Used Dynamic Memory,

Used Video Memory,

Free Video Memory.

Looks like the two last params show used\free physical graphic memory. But what do the GPU dedicated memory and GPU dynamic memory show?

Thank you in advance.

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Used Video Memory and Free Video Memory are detected using NVAPI, the proprietary software interface for nVIDIA ForceWare video drivers. Hence that info is only available on GeForce video adapters.

GPU Used Dedicated Memory and GPU Used Dynamic Memory are detected using D3DKMT calls, and so they are video adapter manufacturer independent. They represent the dedicated (on-board) memory usage, and the dynamic (off-board) memory usage. Dedicated memory is the amount of video memory allocated statically by the video adapter. It is mostly the video memory soldered on the video card PCB. Dynamic memory however may be dynamically allocated from the system memory, to expand the amount of video memory. Dynamic memory is also the UMA memory used by IGP and APU chips.

Please note that D3DKMT is an unofficial and undocumented interface, and NVAPI is a properitary non-public interface. Due to the manner of those interfaces they are not documented, not explained by their inventor or designer, and so it's not easy to know anything 100% accurate and specific about the values they provide.

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Thank you for a such detailed explanation. Looks like I need to watch to the Used Video memory parameter. I was confused why this value differs from the GPU Used Dedicated memory value and why the GPU Used Dynamic memory isn't equal to 0 inspite of there is still a lot of free video memory. Now I think that NVAPI is more accurate than D3DKMT calls :)

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We've implemented the requested Video Memory Utilization hardware monitoring item. Make sure to upgrade to the latest beta version of AIDA64 Extreme Edition available at:

http://www.aida64.com/downloads/aida64extremebuild1839s1y6ftjhwkzip

After upgrading to this new version, make sure to restart Windows to finalize the upgrade.

Let me know how it works.

Thanks,

Fiery

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Fiery, one thing. This item has appeared in the Sensor Icons item in the Preferences but it can't be configured and it doesn't have an icon so it isn't shown in the tray (but it's always checked).

And one problem in this forum: attached image isn't clickable in the Post Preview.

post-781-0-50318000-1330879805_thumb.png

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Fiery, one thing. This item has appeared in the Sensor Icons item in the Preferences but it can't be configured and it doesn't have an icon so it isn't shown in the tray (but it's always checked).

Thank you, we'll fix that in the next AIDA64 beta release.

And one problem in this forum: attached image isn't clickable in the Post Preview.

It works fine in IE 9.0 and Chrome 17 for me. What web browser do you use?

Thanks,

Fiery

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