I'd like to ask what is the relationship of RAM Type / Speed and Front-Side Bus (FSB) Speed? To be more specific, if I have a MacBook with the following specs: Processor: 2.0 GHz Front-Side Bus: 1066 MHz RAM: 2GB PC2-5300 DDR2 667MHz Can I easily replace the RAM Type with PC2-6400 DDR2 800MHz? Or, are there extra steps and factors that I need to consider? I'm actually thinking whether I should wait for the Mid-2009 MacBook white or just buy the Early-2009 model (and use the savings to upgrade the specs). So, would a 2.13GHz processor have a significant / noticeable advantage compared to a 2.0GHz processor?