Komputerbay 512MB SDRAM SODIMM (144 Pin) LD 133Mhz PC133 FOR Apple Mac Memory PowerBook G4 500Mhz (Titanium) 15\ (M5884) 90" 512MB Komputerbay 512MB SDRAM SODIMM (144 Pin) LD 133Mhz PC133 FOR Apple Mac Memory PowerBook G4 500Mhz (Titanium) 15\ (M5884) 90" 512MB SDRAM (Synchronous DRAM). 133 Mhz (backward compatible with PC 100/66). 144 PIN Memory . BRAND NEW 512MB PC133 SDRAM SODIMM 133MHZ . SODIMMs are commonly found in notebook computers. COMPATIBLE WITH Apple Mac Memory PowerBook G4 500Mhz (Titanium) 15\ (M5884) 90" Lifetime Warranty