1GB RAM Memory Upgrade for the iBook G4 and Powerbook G4 Apple notebooks (DDR-333, PC2700, SODIMM) Guaranteed Compatible for the iBook G4 (1.25, 1.42, 1.33GHz 12 and 14-inch), PowerBook G4 (1.25, 1.33, 1.5 and 1GHz. All sizes) and Mac Mini 1.25GHz Speed up your system with up to 2.0GB of Memory! 4AllMemory Branded RAM comes with a lifetime replacement warranty! Will ship the same day when ordered at or before 4pm EST! All others ship next day! Fully-staffed call center to help with installation or inquiries! Call 866-335-1355 with questions or for help!