Dell OptiPlex Gxi - Manual (Page 67)

Expansion Card Removal (Low-Profile Chassis): OptiPlex GXi
1. Disconnect any cables from the expansion card being removed.
2. Remove the expansion-card cage.
3. Remove the retaining screw from the card-mounting bracket.
4. Grasp the expansion card by its corners, and carefully remove it from the expansion-card connector.