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I have a 2,1 macbook with 4GB ram of which 64mb are dedicated to the video card. Can I increase this to at least 512?

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Generally, VRAM is soldered on/in somewhere. I suppose you could, if you had the know how, but the short answer is, no.

Edit: That is, VRAM is not (usually) taken from the pool of "available RAM," it's actually separate RAM entirely. And dedicated to the GPU, only.

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well that royally sucks –  dassouki Jan 7 '11 at 18:17
Actually, MacBooks tend to have integrated graphics, which do not have separate VRAM - they do use the same RAM as everything else. Unfortunately, I don't believe there is a way to increase the RAM allotment. –  CajunLuke Jan 7 '11 at 19:34

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