Intel DP45SG - Manual (Page 41)

Installing and Replacing Desktop Board Components
41
Installing a PCI Express x16 Card
Follow these instructions to install any PCI Express x16 card:
1. Observe the precautions in "Before You Begin" on page 25.
2. Place the card in a PCI Express x16 connector (Figure 20, A) and press down on
the card until it is completely seated in the connector and the card retention notch
on the card snaps into place around the retention mechanism pin on the connector.
3. Secure the card’s metal bracket to the chassis back panel with a screw
(Figure 20, B).
Figure 20. Installing a PCI Express x16 Card