Asus MAXIMUS VII IMPACT User Manual page 136

Intel LAN Controller [Enabled]
This item allows you to enable or disable the Intel LAN Controller.
Configuration options: [Disabled] [Enabled]
Intel LAN PXE Option ROM [Disabled]
This item appears only when Intel LAN Controller is set to [Enabled].This item allows
you to enable or disable the Intel LAN preboot execution environment (PXE) option
ROM. Configuration options: [Disabled] [Enabled]
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Chapter 3: BIOS setup