ASROCK X79 Extreme6/GB User Manual page 27

Some VGA cards violate the PCI-E spec and may result in mechanical
conflict with ASRock Game Blaster. In this case, we suggest you to follow
the steps below to uninstall the chassis of the ASRock Game Blaster to fix
the conflict.
Step 1. Unscrew the four screws which hold the chassis and ASRock Game
Blaster together.
Step 2. Remove the chassis of the ASRock Game Blaster.
Step 3. Refasten the screw on the upper left corner and secure it with the screw
nut which is bundled with ASRock Game Blaster.
27