Can I add 2gb RAM to MacBook Pro 2.53?

I may be buying MacBook Pro 2.53ghz that already comes with 4GB Ram.
But in selling my MacBook 2.4ghz, the buyer doesn't need the extra 2GB that I fitted in there.
Question is, can I use the 2gb from my old Macbook to fit into MBP 2.53ghz?
Forgive my ignorance on this issue. I have no idea how the RAM slots work!
Message was edited by: RUnited

No.
For two reasons. First, unless your old machine is one of the brand new late 2008 models, it does not use the DDR3 1067MHz memory. So the memory in that machine is different and won't work.
Second, even if your old machine was one of the brand new computers... the 2.53GHz machine already has 4GB installed. It gets there by putting a 2GB memory module in each of the 2 slots inside the computer. Meaning, there are no slots left.
Some sites on the internet are reporting that it is possible to boost the memory of the new MacBook Pro to 6GB, but the way people are getting there is to remove one of the 2GB modules and then replace it with a 4GB module. Because of a limitation in the design of the system/operating system, you can not currently pull out both the 2GB modules and replace them with 4's to get you to a max of 8GB.
Hope that helps!

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