OWC / Other World Computing 1GB 400MHz 184-Pin DIMM DDR (PC-3200) Memory Upgrade Module for PowerBook G4, iBook G4, iMac G4 and PC Desktop 64x8 device based 128x64 Module 8 Non-Stacked TRUE PC3200 Devices per side CAS - 3.0 Also supports PC200 CAS 2.0, PC2100 CAS 2.0 or 2.5 operation, PC2700 CAS 2.5 operation Fully compliant with JEDEC specifications