Dell OptiPlex 745 - Manual (Page 122)

8. If applicable, before replacing the card retention mechanism, ensure that:
l The tops of all cards and filler brackets are flush with the alignment bar.
l The notch in the top of the card or filler bracket fits around the alignment guide.
9. Snap the card retention mechanism into place, securing the card(s) in the computer.
10. If you're installing a serial port adapter, connect the adapter cable to the serial port adapter connector (SER2) on the system board.
11. Connect any cables that should be attached to the card.
See the documentation for the card for information about the card's cable connections.
12. Replace the computer cover (see Replacing the Computer Cover ), reconnect the computer and devices to electrical outlets, and then turn them on.
13. If you installed a sound card:
a. Enter system setup, select Audio Controller, and change the setting to Off (see Entering System Setup ).
b. Connect external audio devices to the sound card's connectors. Do not connect external audio devices to the microphone, speaker/headphone,
or line-in connectors on the back panel.
1 PCI Express x16 card
2 lever
3 securing slot (not all cards)
4 securing tab
5 PCI Express x16 card connector
1 fully seated card
2 not fully seated card
3 bracket within slot
4 bracket caught outside of slot
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 wall jack and then plug it into the computer.