1 
card retention door
2 
card retention mechanism 
3 
release tabs (2) 
NOTICE: Do not route card cables over or behind the cards. Cables routed over the cards can prevent the computer cover from closing properly or cause damage to the equipment.
NOTICE: To connect a network cable, first plug the cable into the network port or device and then plug it into the computer.
13.Replace the computer cover, reconnect the computer and devices to electrical outlets, and then turn them on.
14.If you installed a sound card:
a.Enter system setup, select Audio Controller, and then change the setting to Off.
b.Connect external audio devices to the sound card's connectors. Do not connect external audio devices to the microphone, speaker/headphone, or
15.If you installed an
a.Enter system setup, select Integrated NIC, and then change the setting to Off.
b.Connect the network cable to the
16.Install any drivers required for the card as described in the card documentation.
Removing a PCI Express Card
1.Follow the procedures in "Before You Begin."
2.Remove the computer cover.
3.Gently push the release tab on the card retention door from the inside to pivot the door open. Because the door is captive, it will remain in the open position.
4.If your computer includes a card retention mechanism, to secure the x16 card in place from the top:
a.Pivot the mechanism upward and gently squeeze in on the sides to release the mechanism from the two tab slots holding it in place.