Yes, it DOES HAVE to be low profile. Low profile is 1.25 inches. regular profile is 2 inches andit just won't fit in the space for a 1.25. I bought a Micron brand low power 512 from Memory4Cheap for $102. With my airport card turned on all the time I get at least 4 hours of battery time with the low power RAM > We are currently stocking the Micron brand 512mb SO-DIMMs for the > iBook. They are PC-133 CL2 which is the fastest type of RAM that is > compatible with the iBook. > > Please call (217) 352-6202 to order, or order online at: > http://www.memory4cheap.com/ItemPage.asp?Item=MIBOOK512 On Friday, April 25, 2003, at 03:03 AM, iBook List wrote > BTW does it especially have to be low profile b/c I see also SO DIMM > w/o > the 'low profile' add-on being sold, are they the same?