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Krafty

macrumors 601
Original poster
Dec 31, 2007
4,469
344
La La Land
I just ordered a 2GB stick, so if I can just replace one of the 512MB sticks, right?
 
It'll work, but you theoretically would get better performance (about 10% difference) with matched 1GB modules in RAM and graphics-heavy applications.

But, if you're using multiple smaller apps at the same time, then you might be better off with 2.5GB - the extra 512MB might prevent OS X from swapping out to virtual memory.

So, basically, it depends on what you do with your machine. But either way, it'll physically work.

Edit: WAIT! You have a Core Duo MacBook? Not a Core 2 Duo? Then, NO, it wont work at all. Those machines have a 2GB maximum RAM limit. 1GB per slot. I've read that they wont even boot with a 2GB DIMM (let alone two) in the machine.
 
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