ASROCK 1U2LW Series User Manual page 22

Installing the Add-in Card
Before installing an Add-in Card, you need to install a mezzaine card and a riser card first.
Please refer to the followings for instructions.
1. Install the Add-in Card to the assembly.
2. Secure the Add-in Card to the assembly with the screw.
3. Align the assembly with the openings of the chassis.
4. Attach the assembly to the cahssis with the screw that was previously set aside.
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