Acer Altos R720 Series - Manual (Page 75)

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Removing and installing a PCI card
Note: The PCI riser assembly includes an intrusion switch that
engages the system cover. The intrusion switch is provided to
allow server management software to monitor removal of the top
cover from the server.
Caution! The PCI riser assembly must be installed to maintain
proper airflow inside the server.
Removing and installing the PCI riser assembly
PCI riser boards are installed in a removable PCI riser assembly. This
section explains how to access the PCI riser assembly and remove and
install PCI cards.
To remove the PCI riser assembly:
1 Observe the ESD precautions and pre-installation instructions
described on page 35.
2 Remove the CPU air duct. Perform the instructions described in “To
remove the CPU air duct” section on page 42.
3 Diconnect any cables attached to an installed PCI card.
4 Grasp both riser latches with thumb and forefinger, then pull up to
release the riser assembly (A).