I see that you are inquiring about the fixed maximum shared video memory options in BIOS and if you are able to select different values from the ones listed.
In regards to your inquire this will depend on the motherboard manufacturer and the amount of memory installed on your computer.
Currently most of systems on the market will only have those options, please note that this is the maximum RAM memory that the video controller will take when required.
Unfortunately you are only able to select between those presets.
I have a DH67GD motherboard with a core i5 2500.
In the bios settings there is an option to set DVMT to 128MB, 256MB, or MAX DVMT. (1696MB, information given by Intel graphics panel).
Looking at the information panel of Intel graphics, we can see the size of allocated memory to DVMT, going higher following windows openings.
Selecting 256MB in the bios or MAX DVMT seems to have no effect when looking at this panel, I was capable to make the memory increase higher than 400MB with the bios setting to 256MB (limit ?) and the Information panel still tells me that the maximum is 1696MB.
I have no need to lock the use to 256MB but I would appréciate to know how this feature works and if it really works.
Is there some other setting somewhere taking over the bios one ?
Is it necessary to reinstall the graphics driver to take into account a new bios setting ?
Operating system: Windows 7 64bit home premium edition, Intel graphics latest at this time (188.8.131.526)
Thanks to answer, but I dont understand what you mean, if it is clear for you maybe can you add few words ?
Do you mean that what I see in Intel graphics panel DVMT use has nothing to do with the IGD DVMT setting in the bios ?
The manuals I have already searched in, are not speaking a lot about DVMT and the bios setting about DVMT.
My understanding is in line with the two first posts, except that what I observe is not.
DVMT= Dynamic Video Memory Technology
DVMT automatically allocates System memory for the integrated GPU. As far as I know in Vista/Windows 7 DVMT is enabled on default.
And to your initial question I quote the manual of my Board: "This item will not be used under
Windows® VistaTM / 7 OS because the driver will intelligently detect
physical memory available and allocate necessary video memory".
In summary, you can't change DVMT under Window 7. But I see no reason to lower the size. You might lower the shared RAM size.
Thanks a lot for taking your time to explain.
Following your first answer I got the same page as the one of the link you give, and read the overview of DVMT for one of the chipsets (915) because nothing is available for Sandy Bridge.
I understood that the parameters in bios are probably for pre-allocated memory, in the case of an operating system not compatible with DVMT.
My remaining question was if this memory allocation has some effect when using a DVMT compatible OS as windows 7, and the manual of your board says no.
The two manuals of my DH67GD dont say anything about this, only one occurence of the word DVMT, to say that it supports the feature.
Thanks, my question is answered.
Depending on the BIOS of the computer then the way DVMT option will appear.
You can try looking for Dynamic Video Memory Technology or Graphics Memory. There is a chance the computer manufacturer has hidden that option so; nobody can edit it. I recommend contacting the computer manufacturer so; they can let you know if it is possible or not to change DVMT settings in that specific computer model.