Dell OptiPlex 790 (Early 2011) - Manual (Page 42)

Installing the System Fan
1. Place the system fan in the chassis.
2. Pass the four grommets through the chassis and slide outward along the
grooves to secure them in place.
3. Connect the fan cable to the system board.
4. Install the
cover .
5. Follow the procedures in After Working Inside Your Computer .
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