By dissecting technical documentations of new MacBook Polycarbonate we note the similarity of the placement of the components and also the shape of the mother board compared to MacBook Unibody. To illustrate these observations, here are two photographs taken from the site of iFixit.
On the left is the mother board of MacBook Unibody Alu 2008 and on the right that of the polycarbonate unbody 2009. As you can see, the shape, the position of the CPU and of the chipset are identical. There are some differences at the level of the connectors,
