GPU question Smart people Only

If it used your system memory, then it would not be a 1gb video card, it would be 0gb video card.

1gb of video memory means 1gb of video memory, not 1gb of system memory.

Do you not know of the cards that are/were advertised as say a 512MB card but they only had 256MB of RAM themselves and shared the other 256MB with the motherboards RAM?

GPU's would come with Vram (virtual ram) that is preinstalled in their hardware, hence they are dedicated to the video card for carrying out the visual processing of your system. On devices, for example laptops, they would come with integrated video cards, that share your computer's RAM, hence adding more RAM for that scenario may be beneficial for overall system performance.

If you buy a video card with 1 GB of VRAM, it will be dedicated for gaming, using the Windows Aero effect, movies, etc. You will still have your 2 GB of DDR2 system ram for programs.

Even the dedicated video cards come with the ability to share your system RAM and use as shared video RAM, but because you will be getting a 1 GB video card anyway, you would not need to share your system RAM. remember, system ram is going to be slower than your VRAM on the video card, if shared.

Yes I know that, do you think you are trying to teach me something here?  

Sorry, tagged the wrong post.

Certain low end cards will have dedicated ram and also share system ram.
Nvidia calls it Turbo Cache and ATi names it Hyper Memory.

Best answer selected by leoqaz.

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http://www.tomshardware.com/
http://www.anandtech.com/
http://www.techpowerup.com/
http://www.guru3d.com/
http://www.xbitlabs.com/
http://www.hardwaresecrets.com/
And many more!

This topic has been closed by Mousemonkey