I have about 1.5GB of RAM in my Core Duo MacBook Pro right now. How much of a performance boost do I get from matched RAM? Also, can I put 2 2GB RAM cards into my MacBook Pro or can the logic board not handle it?
A matched pair won't bring you that large of a performance boost. ...But if you were to upgrade to 2 x 1 GB chips, you'd be getting an extra 500 MB + the bonus of having a matched pair ...which together, would be noticeable.
I think the most common value that people say matched pairs can bring is
around 5-10% (while 10% seems rather high for my taste).
I'd say you'll get the most boost out of the extra 512MB