In what order would you install memory modules for optimum performance on an iMac? There are two banks and two dimms, how should the modules be seated for optimum performance? I used to have 2x2GB seated at B0 D0 and B1 D0 (B=Bank, D=Dimm). Now i just another extra 16GB (2x8GB), what do you think and why, is there some guide for seating them for best performance gain?