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Originally Posted by Zebulunite
128mb of VRAM would be better for HD video output.
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Actually, it wouldn't much matter, unless we're talking about one of ATI's new chips with hardware H.264 decoding. So far, the H.264 decoding is done on the CPU.
Now I realize you didn't specifically mention H.264, but still: the VRAM is more than enough to handle 1920x1080 (the full HD resolution -- which btw the screen wouldn't even display anyway).
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And while the 12" Powerbook does come with 512MB of RAM, half is in the memory slot (meaning that you would lose it when you upgrade),
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Yeah, but I see them changing that. It'll probably come with 512 in the fixed slot, then options for 1 GB, 1.5 GB or 2.5 GB total.