PCI Slots Shield – Power Mac G4 QuickSilver & Digital Audio $5.00 Apple PCI Slots Shield - Power Mac G4 QuickSilver & Digital Audio quantity Add to cart Add to Quote Continue Shopping Category: Case & Internal Parts (G3 to G5) Tags: pci, pci shield Description Shield for the PCI slots on a Power Mac G4, Digital Audio and QuickSilver models. Apple 922-4375, 805-2756, 805-2756-A.