I did forget to mention, that things seemed to get a little bit hotter on the bottom, but its hard to tell only by feel. May have to consider that the ibook might get a bit more hot, and the fan may turn on more often. I'm fairly confident about the install for the Fujitsu, since there are several companies which do that very same swap and many positive reviews about the swap with my particular computer, but I haven't heard of anyone doing on an ibook (though I'm sure they're out there) Al --- You wrote: Thats the one i was looking at was just worried about a huge diff in power consumption. Thanks Richard --- end of quote ---