Power Mac 8500 – Chassis, Rear Panel, AV Module, PCI Retainer $75.00 Power Mac 8500, 8550 Power Mac 8500 - Chassis, Rear Panel, AV Module, PCI Retainer quantity Add to cart Add to Quote Continue Shopping Category: Power Mac 8100-8500 Quadra 800 Description Power Mac 8500, 8550 – Chassis, Rear Panel, AV Module, & PCI Retainer. 815-1933, 815-2072.