Acer Altos G710 - Manual (Page 80)

3 System upgrade 70
9 Press the PCI slot lock lever on the rear panel of the server (5).
Note: If you are installing I/O cards in the x4 PCI Express slot,
secure the bracket with a screw before replacing the air baffle.
10 Observe the post-installation instructions described on page 40.
Note: When you turn on the system, the BIOS setup automatically
detects and assigns resources to the new device (applicable only to
Plug-and-Play expansion cards).