Agere 4 Port PCI USB Card $20.00 Add USB to your Mac Agere 4 Port PCI USB Card quantity Add to cart Add to Quote Continue Shopping Category: Cards - Boards (Macintosh) Description Agere 4 Port PCI USB Card – 1PC-PC4-01-4 – This 4 port USB card has been tested in a Power Mac G4 Quicksilver.