2GB KIT 4 x 512MB Apple Power Mac Series G4 Dual 450/500MHz G4 PII 350-500Mhz G4 Server 450/500 G4 Server Appleshare IP - 450/500MHz DIMM SD NON-ECC PC100 100MHz RAM Memory Genuine A-Tech Brand 2GB KIT (4 x 512MB) DIMM SD NON-ECC PC100 100MHz 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)