Acer AR320 F1 - Manual (Page 64)

3 System upgrades 46
Installing an expansion card
Your server has a preinstalled riser card designed specifically for use in
the 1U rackmount chassis. You can install low-profile PCI Express cards
on the left and right slots.
Installing a PCI Express card on the left slot
1 Perform the pre-installation instructions described on page 22.
2 Remove the screw that secures the PCI expansion slot bracket to
the server.
3 Lift to remove the PCI slot bracket.
4 Remove the screw that secures the PCI slot shield. Store the screw
for reassembly later.