My MacBook is the late 2008 aluminum one, with 2,4 GHz and backlit keyboard.
I understand that these first two have a 2,0 GHz processor but with different serial numbers, and the third one has the 2,4 GHz processor.
Could I use any of these?

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I understand that these first two have a 2,0 GHz processor but with different serial numbers, and the third one has the 2,4 GHz processor.
Could I use any of these?