Apple PowerBook Memory Upgrade Configurator - choose your Model:

G3 14-inch (Bronze Keyboard)
G3 14-inch (Firewire/Pismo)
G4 12-inch (PC2100)
G4 12-inch 1.33GHz (PC2700)
G4 12-inch 1.5GHz (PC2700)
G4 12-inch 1GHz (PC2100)
G4 15-inch (Titanium 400/500)
G4 15-inch (Titanium 550,667)
G4 15-inch (Titanium 667,800)
G4 15-inch (Titanium 867/1000)
G4 15-inch 1.0-1.25GHz (PC2700)
G4 15-inch 1.33/1.5GHz (PC2700)
G4 15-inch 1.5-1.67GHz (PC2700)
G4 15-inch 1.67GHz (PC2-4200)
G4 17-inch 1.33GHz (PC2700)
G4 17-inch 1.5GHz (PC2700)
G4 17-inch 1.67GHz (PC2-4200)
G4 17-inch 1.67GHz (PC2700)
G4 17-inch 1GHz (PC2700)