I have a PowerBook G4/550 (generation 2 of the PBG4), and I have old RAM from my old PowerBook G3/400 Lombard. Will this RAM work with my newer PowerBook?
I am pretty sure the PBG4 needs the DIMMs to be PC-133 rated. If those DIMMs you have are PC-133 compliant, it should work. But you should check with an Apple technician first.