Model A1181: 1.83, 2, 2.1, 2.13, 2.16, 2.2, or 2.4 GHz Core 2 Duo processor

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Can I upgrade from 2Gb to 3Gb RAM

I have a MacBook 2.4GHz Core 2 Duo model 1181 (Penryn). I understand that this model can only address a maximum of 3Gb of RAM. If I want to upgrade my RAM, can I replace just one of the two 1Gb chips to a 2Gb chip in order to obtain the maximum 3Gb addressable? Or do I need to upgrade both of the 1Gb chips to 2Gb chips? In other words, is it necessary to have symmetry between the 2 RAM chips, or will a combination of one 1Gb chip and one 2Gb chip work correctly? Thanks!

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*Apple officially supports a maximum of 4 GB of RAM but third-parties have been able to upgrade the system to 6 GB of RAM using one 2 GB and one 4 GB memory module.

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I'd go with the 6GB


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You can use these chips.

PC2-5300 2 GB RAM Chip Image


PC2-5300 2 GB RAM Chip


PC2-5300 4 GB RAM Chip Image


PC2-5300 4 GB RAM Chip


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Watch out for anything other than 667 MHz! I just bought 2 2GB 800MHz chips that don't work.

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Joel will be eternally grateful.
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