Thanks for the response, Larry. I ran the hard disk CD again and it showed the memory to be OK. I had the extra 512 mb slab added when I bought the machine, so I'm reluctant to take it out myself at this time... this said by someone who used to add RAM chips by the dozens, PCI cards, and faster processors to IIvx's and 7300s. I want to watch it some more so I can get a better grasp on what might be triggering the freezes; I had it happen twice today and both times I was using Eudora. I still tend to accuse Tiger - I upgraded to 10.4.4 a week or two ago and the problem started with serious intent. Overall, I've had a lot of problems with Tiger and am almost anxious to burn another $129.95 for whatever cat comes next (Leopard? Puma? Cheetah? [I'd like this for an OS for my G5 iBook when/if it ever happens.], Lynx? Ocelet?). Fred At 21:29 -0500 24/01/2006, Larry Kollar wrote: >Fred Stevens K2FRD wrote: > >>Lately, my 14" iBook G3 900 (640 RAM; 40 GB HD) has taken to freezing/locking up.... >> > >Try popping the extra RAM out (after shutting down, but you knew that). If the problem clears up, order a new stick. > >-- >Larry Kollar k o l l a r @ a l l t e l . n e t >"The hardest part of all this is the part that requires thinking." >-- Paul Tyson, on xml-doc