Dell OptiPlex 755 User's Guide - Page 184
Integrated NIC, Onboard Devices
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13 If you installed a network adapter card and want to turn off the integrated network adapter: a Enter system setup, select Integrated NIC from the Onboard Devices group, and change the setting to Off (see "System Setup" on page 280). b Connect the network cable to the network adapter card's connectors. Do not connect the network cable to the integrated network connector on the back panel of the computer. NOTICE: If you disable the integrated network adapter, you will not have AMT functionality. 14 Install any drivers required for the card as described in the card documentation. Removing a PCI Card 1 Follow the procedures in "Before You Begin" on page 21. 2 Remove the computer cover (see "Removing the Computer Cover" on page 168). NOTE: For PCI card locations, see "System Board Components" on page 172. 3 Gently lift the release tab on the card retention latch from the inside and pivot the latch open. 4 If necessary, disconnect any cables connected to the card. 5 Grasp the card by its top corners, and ease it out of its connector. 1 2 3 4 5 1 release tab 4 card-edge connector 184 Expansion Cards 2 card retention latch 5 card connector 3 PCI card