Long story short, replaced my 06 with an early '08 last year and gave me 4 x 1GB of RAM. I just bought 4 x 2GB of RAM from OWC. What's the best RAM config? All the 2GB modules on Riser A and the 1GB modules on Riser B or are like sizes split in pairs between A and B? Ugh! I know I saw a thread about this ages ago where someone posted a graphic of every possible combination and where to put them. I just couldn't seem to find it.