Apple Power Mac G5 (AGP/PCI Card Replacement) - Manual (Page 5)

Power Mac G5 AGP/PCI Card - 5
8. Remove the air deflector and place it on a soft, clean cloth. (Figure 4)
Figure 4
Important: Always remember to replace the air deflector after you have finished working
inside your computer. The Power Mac G5 computer will not function properly if the air
deflector is not replaced.
Removing the Installed AGP/PCI Card
1. Locate the AGP/PCI card inside the computer. (Figure 5)
Figure 5