Im looking into upgrading the speed of my early 2008 macbook and have decided that the easiest solution is an SSD and 4GB of RAM (it can apparently hold 6 but Id rather have the 4 paired) The problem arose when I saw the prices. RAM isnt EXPENSIVE but its still more expensive than the stuff in my iMac which Ive been looking to upgrade further anyway. So, I got the thinking. If I can buy 8GB for my iMac for cheaper than 4GB for the macbook, why not just take the 4GB I have in the iMac, pop it into the macbook and then buy an 8GB set to replace it. Sounded like a great deal...in theory. My question is, and I think I already know the answer, will it work? The default apple RAM installed in my macbook is only 667 MHz DDR2 SDRAM while my iMac is running 1333 MHz DDR3.... Clearly they are not the same thing. Am I right to assume that my theoretically cheaper plan wouldnt work as the macbook couldnt handle such strong RAM?