CPU or Processor Fan Assembly – Power Mac G4 QuickSilver $20.00 QuickSilver and QuickSilver 2002 CPU or Processor Fan Assembly - Power Mac G4 QuickSilver quantity Add to cart Add to Quote Continue Shopping Category: M8493 Power Mac G4 Quicksilver Description CPU or Processor Fan Assy for all Power Mac G4 QuickSilver Models. Apple 922-4580.