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I’m thinking of upgrading my MacBook from 512Mb ram to 1Gb or 2Gb. Do you have any advice for me? Should I buy 1Gb module to get to 1Gb/256Mb or is it better to have same ram size for both slots (512+512Mb or 1024+1024Mb)?
from developer.mac:
Because the memory in the two slots is configured as a contiguous array of memory, both SO-DIMMs must be the same size and type for the interleaving function to be used to improve performance.
Have you got some benchmarch that can help me to choose between these configurations?
Disassembly you mac:
Removing Ram or HD in MacBook is quite simple (see all info here).
Prices:
ram prices are very differents: 1Gb at $119.98, at 198$, at 235€
What to choose? Help meeee!


I bought a PowerBook with a single 512MB dimm to have slot space for future mem upgrade without waste dimm.
But the new MacBook needs pairs of dimms, so you have to waste your 2×256MB dimms and buy additional 2×512MB.