Where used: Power Mac G4 (QuickSilver), Macintosh Server G4 (Digital Audio), Macintosh Server G4 (Gigabit Ethernet), Power Mac G4 (AGP Graphics), Power Mac G4 (PCI Graphics), Macintosh Server G4 (AGP Graphics), Power Mac G4 (Gigabit Ethernet), Power Mac G4 (Digital Audio)Apple original partMac-Pro gives a 90-Day warranty on all manufacturers defects. Defective product can be sent directly to Mac-Pro for replacement.Instructions for installation are available for $14.99. Simply type in the words ""instructions"" on the customer comment field and we will add the complete instruction manual for $14.99 to your order.Apple part number: 922-3982