Dell EMC PowerEdge C6420 Manual page 97

Steps
1 Remove the screw that secures the expansion card to the assembly.
2 Hold the expansion card by its edges, and carefully remove it from the riser card.
NOTE: You must install an expansion card filler bracket over an empty expansion slot to maintain Federal
Communications Commission (FCC) certification of the system. The brackets also keep dust and dirt out of the system
and aid in proper cooling and airflow inside the system.
Figure 43. Removing an expansion card
Installing and removing system components 97