NVIDIA GeForce 9400M

waltervt

macrumors member
Original poster
Jun 24, 2011
63
0
Valencia, Spain
Hi everybody, I have a stock Macbook Pro 13'' (mid 2009). It has 4GB of RAM and a NVIDIA GeForce 9400M graphics card using 256MB of the RAM.

I'm gonna upgrade the RAM to 8GB so I was wondering if I can make the graphics card use more than just 256MB.

Cheers
 

snowman1

macrumors regular
Mar 17, 2010
150
13
As far as I know, the NVIDIA 9400m cannot expand the amount of memory that it shares with the CPU. Only the Intel HD 3000 can do that.
 
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waltervt

macrumors member
Original poster
Jun 24, 2011
63
0
Valencia, Spain
The RAM the GPU uses is called VRAM, and can't be expanded. So upgrading the main RAM won't let the GPU use more than 256MB.
But it DOES take those 256MB from the RAM, right? Because I have 4GB and it shows only 3.75GB available. I think there must be a way, I just don't know how.
 
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biohead

macrumors 6502
Jun 18, 2010
428
6
West Drayton, UK
Yes that 256mb is taken from ram. If you upgrade to 8 gb, you'll have 7.75gb usable instead.

You can't make the 9400m use more than 256mb in OSX.

I think in Windows, it uses 512mb.
 
Last edited:
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mikeo007

macrumors 65816
Mar 18, 2010
1,373
122
Yes that 256mb is taken from ram. If you upgrade to 8 gb, you'll have 7.75gb usable instead. You can't make the 9400m use more than 256mb.
I believe you can under Windows 7, so there may be a way under OSX as well. It's just reserved RAM, there's nothing special about the 256mb that the integrated GPU uses.
 
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