I've got a spare 2gb Ram taken from a macbook pro and was thinking about adding it to my black macbook. My macbook is a rev B (Late 2006). From a site: *Apple officially supports 2 GB of RAM, but third-parties have been "unofficially" able to upgrade it to 3 GB or 4 GB of RAM (it can hold 4 GB but cannot fully utilize the memory beyond 3 GB). Im thinking about adding that 2gb ram to make it 3gb. but i want to know what are the problems that i may face. Would i be void of apple warranty if anything happens? (expires end of this year anyway) or any other hardware problems? **UPDATED 20/5** So i just bought Corsair 2x 2gb (4gb) RAM for my macbook and installed it. To my surprise, when i checked the System Profile it shows it as 4gb RAM memory, rather than what websites have said that it would be only 3.3GB. I also notice that startup took a little longer than before, but assume its the first time with new ram. Then i ran a memory test xbench. and the results i got were much lower than my previous results with 2gb just before i upgraded. the results now 78.98 compared to previous 111.26. For details - http://db.xbench.com/merge.xhtml?doc2=368540- then type 'BP Macbook' in search to compare with my original 1.Just why is it so much lower when i have more ram? any reasoning for this? is the ram at fault? 2. Just looking at memory test, there is an increase. but it seems to be barely much at all? 3. Why does it show 4gb? my macbook bought around dec 2006. PS. I actually bought a new HDD 7200rpm 320gb as well, but have not installed it yet.