Fujitsu PRIMERGY RX4770 M5 Upgrade And Maintenance Manual page 214

Expansion cards and backup units
Figure 111: Removing the riser card - example: riser module 3/4
▶ Remove the two screws from the upper side (see circles).
▶ Only for riser module 3/4 and 6/7: Remove the screw from the rear side (see
close up).
▶ Remove the riser card.
214 Upgrade and Maintenance Manual RX4770 M5