512MB STICK For Apple Power Mac Series G4 (AGP Graphics) G4 (Digital Audio) G4 (Dual 1GHz SDRAM) G4 (Dual 450/500MHz) G4 (Dual 466-733Mhz) G4 (Dual 800MHz) G4 (Gigabit) G4 (PII 350-500Mhz) G4 (PII 466-733Mhz) G4 (Single 800/933MHz) G4 (Single 867MHz) G4 Server (450/500) G4 Server (733MHz) G4 Server (Appleshare IP - 450/500MHz) G4 Server (AppleShare IP - 533MHz) G4 Server (Dual 800MHz). DIMM SD NON-ECC PC133 133MHZ RAM Memory. Genuine A-Tech Brand. 512MB STICK DIMM SD NON-ECC PC133 133MHZ RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Apple Power Mac Series. (See Compatibility List Below)