Turn off the system, including any attached peripherals, and disconnect the system from the electrical outlet and peripherals.
Open the system.
Remove the cooling shroud.
Remove the expansion-card riser 1.
Push down the two release levers at the edge of the card to disengage the card from the connector.
Angle the card so that the other end of the card disengages from the storage-controller card holder on the system board.
Replace the expansion-card riser 1.
Replace the cooling shroud.
Close the system.
Reconnect the system to its electrical outlet and turn the system on, including any attached peripherals.