Lay your Mac Pro down on a soft, clean cloth to avoid scratching it or the work surface.
Unscrew the captive screws in the PCI bracket and remove the bracket.
Remove the port access cover from the slot in which you plan to install the card.
Remove your new card from its static-proof bag and hold it by its corners. Don't touch
the gold connector or the components on the card.
Working Inside Your Computer
Port access cover
To remove a card,
push on the tab
to release the catch.