Komputerbay 1GB (512MBx2) DDR SODIMM (200 pin) 266Mhz DDR266 PC2100 FOR Apple Mac Memory iBook G4 1.33GHz 12\ (M9846D/A)" 1 GB (512MBx2) Komputerbay 1GB (512MBx2) DDR SODIMM (200 pin) 266Mhz DDR266 PC2100 FOR Apple Mac Memory iBook G4 1.33GHz 12\ (M9846D/A)" 1 GB (512MBx2) DDR SDRAM (double data rate synchronous dynamic random access memory). Twice the bandwidth of SDRAM. JEDEC standards for speeds of DDR SDRAM BRAND NEW 1GB (512MBx2) PC2100 Sodimm DDR 266 Mhz Cl 2.5SUPPORTS DUAL CHANNEL COMPATIBLE WITH Apple Mac Memory iBook G4 1.33GHz 12\ (M9846D/A)" Lifetime Warranty