parts-quick 1GB Memory for Apple PowerBook G4 12 inch 1.5GHz DDR PC2700 200 pin 333MHz SO-DIMM Laptop RAM Upgrade at Amazon.com
256MB RAM Memory for Apple PowerBook G4 17-in 1.0-1.5GHz Black Diamond Memory Module DDR SO-DIMM 200pin PC2700 333MHz Upgrade System Specific Memory - Newegg.com
17-inch PowerBook G4 "Aluminum" Memory Installation Video - YouTube
Apple PowerBook G4 A1106 Refurbished Laptop 4GB RAM
PowerBook G4 Titanium DVI RAM Replacement - iFixit Repair Guide
40 for a 12' Powerbook G4 from FB marketplace (866mhz / 512mb ram) - Now installing Tiger 🐯 : r/VintageApple
Last gen Powerbook G4 with High-Res screen restored with a 256gb SSD, 2gb RAM, and new thermal paste. Really disappointed with the OS9 support however - any suggestions? : r/VintageApple
PowerBook G4 Titanium DVI RAM Replacement - iFixit Repair Guide
1GB Team High Performance Memory RAM Upgrade Single Stick For PowerBook G4 1.5 15” (Al) M9422LL/A PowerBook 5,4 1. The Memory Kit comes with Life Time Warranty. at Amazon.com