He probably meant to say www.memoryx.com. Check www.ramjet.com, as well as www.crucial.com which has already been mentioned. Crucial and I think ramjet have links with background info about RAM, including what PC100 vs PC133 is and what CL is. Also, as I recall, you may have to do a firmware upgrade on a clamshell iBook to have more than the original limit of RAM. (Also, as a netiquette point, I just deleted very many lines of quoted material that were not relevant to the topic, including all the header and list-provider tailer material, which really shouldn't be included in a post.) On Wed, 17 Dec 2003, Myers, Curt wrote: > "losodimm" and it can take the 512 chip. I suggest going to xmemory.com . . .