Will this RAM work with my brand new Macbook? Here's the link: http://www.buy.com/prod/4gb-kit-2x2...-240pin-dimm-non-ecc/q/loc/101/206166546.html Under buy.com's "tech specs" it says that it is PC5400 type RAM. I thought the MB only supported up to PC5300. What I am trying to do here is upgrade my MB's ram to 4gb. Any advice would be much apreciated.