Is the 256MB size of NVIDIA 320M fixed or dynamic?

ecs

Hi!



I'm going to use a Macbook Air with 4GB de RAM, and I need to know if the shared memory of the 320M GPU (256MB according to the Apple website) can grow on demand, or if it's fixed, or if there's some OSX setting where I can allocate it.



According to this link, the GMA X3100 can allocate more shared memory, but it doesn't specify the details for the 320M:

http://support.apple.com/kb/ht3246



If you know, please tell, I need to know this for a satellite-like imagery app that uses more than 256MB textures through OpenGL

nvidia2008

Quote:

Originally Posted by ecs


Hi!



I'm going to use a Macbook Air with 4GB de RAM, and I need to know if the shared memory of the 320M GPU (256MB according to the Apple website) can grow on demand, or if it's fixed, or if there's some OSX setting where I can allocate it.



According to this link, the GMA X3100 can allocate more shared memory, but it doesn't specify the details for the 320M:

http://support.apple.com/kb/ht3246



If you know, please tell, I need to know this for a satellite-like imagery app that uses more than 256MB textures through OpenGL

I think it is dynamic, but only goes up to 256MB maximum AFAIK.

ahrubik

It would seem it's shared.



http://www.appleinsider.com/articles...cbook_pro.html



"According to Notebookcheck.net, the 320M does not have dedicated graphics memory, but uses shared memory for the system for its graphics processing, giving it poorer performance than a GPU with dedicated memory."