Dell 23.8" OptiPlex 7410 All-in-One Desktop Computer (Gray) - Manual (Page 48)

Steps
1. Place the graphics-card fan on the graphics-card shield.
2. Align the screw holes on the graphics-card fan with the screw holes on the graphics-card shield.
3. Replace the two screws (M3x5) that secure the graphics-card fan to the graphics-card shield.
4. Place the graphics card on the graphics-card assembly.
48 Removing and installing Customer Replaceable Units (CRUs)