I know this has most likely been posted before but I just want to be sure before I go ahead and order something. I apologize for repeating stuff. I have a 2008 black macbook (macbook 4,1). 6GB RAM max capacity. I'd like to max it out, but in order to do so, I'd have to put in 4GB+2GB. This is obviously not matching which I hear increases performance if they are matching. I'd like to just hear some thoughts about what you guys think about this. Is it worth it to go with 4+2? Is it better to just go 2+2 since its matching? Will the matching performance of the 2+2 be better than the mismatched 4+2? Although it is only possible for a maximum of 6GB on this system, is it possible to have 4+4 which would satisfy the matching criteria and still provide atleast 6GB of RAM? Any insight would be appreciated! Thanks!