Hi everyone, I've been trying to get my macbook back to working order for school in the fall so I wanted to upgrade the 4GB of ram to 8GB of ram into it so that I can run anything I might need. The problem I'm having is after I put the new ram into my machine it makes 3 beeps when I turn it on. Looking it up I found that, "3 successive tones, a 5 second pause (repeating): This indicates RAM does not pass a data integrity check." The model is Macbook 5,1. It is a late 2008 13" unibody Macbook 2.4ghz. When I put the old 2GB ram stick and the new 4GB ram stick in the computer starts up and shows that it has 6GB of ram. I've rotated both of the new 4GB sticks and both of them work with the 2GB one in there. Just when they are together they fail. I'm just wondering if there is something I'm doing wrong. Is there some way to fix the error? Thank you in advance for the help!