I upgraded my MPB and my iMac late 2006 from 2x1GB (Samsung 1GB 2Rx8 which worked fast) to 3 GB (maximum for these macs) in replacing one RAM with a new Kingston MIMAC/2GB/53. I cannot feel an increase of speed in opening programs, starting my mac or else. Is there a correct sequence how to place the RAM? At the moment I have the 2GB at Bank0/Dimm0 and the 1GB at Bank1/Dimm1. Thanks for your help.