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Video Memory
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Video Memory
Friday, November 2, 2007 at 6:52 am
Posted by sean (261 messages posted)

Does anyone know if there is a way to stop Vista from sharing my RAM with the video card. My video card has 640mb of video memory and I don't think I need more than that.

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re: Video Memory
Friday, November 2, 2007 at 6:57 am
Posted by jbmcmillan (672 messages posted)

Not sure what you mean what makes you think it is sharing?

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re: Video Memory
Friday, November 2, 2007 at 9:08 am
Posted by Alan (124 messages posted)

I would agree with jbmcmillan's insinuated point with his question; I don't think your PC is sharing your system memory when we're talking over 600MB. But, if you do not have a dedicated video card and are, instead, using an integrated GPU that shares part of your system memory, the only way to change the amount of memory would be through the bios, I believe. From everything I've read on this topic, the shared memory setting cannot be changed (although, I'd like to do this on my machine so, if anyone knows of a method to do so, please post it here). Additionally, it seems that adding more memory to your PC doesn't change your video memory, it only adds to the memory available to the system for other applications...... though that's certainly not bad either. In general, though, most systems I've seen with integrated GPU's that share system memory are using around 224-256 MB.

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re: Video Memory
Friday, November 2, 2007 at 12:10 pm
Posted by sean (261 messages posted)

Sorry, my video card has 320mb, not 640mb. I forgot I bought the cheaper one....lol. It is not integrated tho and when I check the display properties it say that it has 256 physical memory (nvidia driver glitch apparently) but it also says that I have a total of 768mb of memory available which leads me to believe that it is sharing system memory. Which I imagine is why when I look in the task manger that it says it's using over 700mb of ram the processes add up to only about 200 and something. WEIRD!!!


On Friday, November 2, 2007 at 8:08 am, Alan wrote:
>I would agree with jbmcmillan's insinuated point with his question; I don't think
>your PC is sharing your system memory when we're talking over 600MB. But, if you
>do not have a dedicated video card and are, instead, using an integrated GPU that
>shares part of your system memory, the only way to change the amount of memory would
>be through the bios, I believe. From everything I've read on this topic, the shared
>memory setting cannot be changed (although, I'd like to do this on my machine so,
>if anyone knows of a method to do so, please post it here). Additionally, it seems
>that adding more memory to your PC doesn't change your video memory, it only adds
>to the memory available to the system for other applications...... though that's
>certainly not bad either. In general, though, most systems I've seen with integrated
>GPU's that share system memory are using around 224-256 MB.

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re: Video Memory
Friday, November 2, 2007 at 1:01 pm
Posted by sean (261 messages posted)

See reply to Alan!!!


On Friday, November 2, 2007 at 5:57 am, jbmcmillan wrote:
>Not sure what you mean what makes you think it is sharing?

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re: Video Memory
Friday, November 2, 2007 at 2:23 pm
Posted by Alan (124 messages posted)

Actually, two things: First, I shouldn't automatically generalize about everyone's PC's. There are a few later models that will allow BIOS settings to be changed for aperture, etc., for graphics memory. If you check your BIOS at startup, you should be able to tell if yours will allow you to make changes. Second, make sure what GPU's are installed in Device Manager and disable any that are not applicable. Also, you can view details about the installed graphics adapter, which will tell you how much memory it has and how much is shared. Do this by clicking Start, Control Panel, under Appearance and Personalization click Adjust screen resolution, click the Advanced Settings button near the bottom, select the Adapter tab (if necessary). Near the middle of the displayed tab you'll see Total Available Graphics Memory, Dedicated, System Video Mem, and Shared. You might already know how to do this, but just in case... :) Last, make sure you have the latest drivers for this card by checking the nVidia site. Hope there's something here that helps sort this out.


On Friday, November 2, 2007 at 11:10 am, sean wrote:
>Sorry, my video card has 320mb, not 640mb. I forgot I bought the cheaper one....lol.
>It is not integrated tho and when I check the display properties it say that it has
>256 physical memory (nvidia driver glitch apparently) but it also says that I have
>a total of 768mb of memory available which leads me to believe that it is sharing
>system memory. Which I imagine is why when I look in the task manger that it says
>it's using over 700mb of ram the processes add up to only about 200 and something.
>WEIRD!!!
>
>
>

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re: Video Memory
Friday, November 2, 2007 at 3:14 pm
Posted by jbmcmillan (672 messages posted)

Vista caches some things in ram so your process' and ram used will not add up so 
nothing wierd about that.It releases it immediately if it needs it so no worry there.I'm 
assuming you have a 8800GTS 320 and would not "share memory "and aperture size is 
not in the bios anymore since pcie has been used.Do you have a motherboard that also 
has onboard video?

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re: Video Memory
Friday, November 2, 2007 at 4:34 pm
Posted by sean (261 messages posted)

No on-board video. I have an ASUS M2NE-SLI board. And yes, I have a 8800gts 320. but in the video properties (advanced tab) it says 256mb ram in physical memory and 768mb total available memory. Where is it getting this extra 512mb from?


On Friday, November 2, 2007 at 2:14 pm, jbmcmillan wrote:
>Vista caches some things in ram so your process' and ram used will not add up so
>nothing wierd about that.It releases it immediately if it needs it so no worry there.I'm
>assuming you have a 8800GTS 320 and would not "share memory "and aperture size is
>not in the bios anymore since pcie has been used.Do you have a motherboard that also
>has onboard video?

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re: Video Memory
Monday, November 5, 2007 at 9:15 am
Posted by quick69gto (840 messages posted)

Windows has always reserved system memory for video no matter what kind of video 
your PC has.
Vista is the only version of Windows that allows the user to see it.
Vista will use the reserved video memory if you start running out of system memory.
The problem with the 8800 is common right now. Nvidia should fix it soon.

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