Asus Z87M-PLUS - Manual (Page 92)

3-34 Chapter 3: BIOS setup
Chapter 3
PCI Express x16_2 slot (dark brown) bandwidth [X2 mode]
[X2 mode] PCIe x16_2 slot runs at X2 mode with all slots enabled.
[X4 mode] PCIe x16_2 slot runs at X4 mode for high performance support. PCIe x1_2
slot will be disabled.
Realtek LAN Controller [Enabled]
[Enabled] Enables the Realtek ® LAN controller.
[Disabled] Disables the Realtek ® LAN controller.
The following item appears only when you set the Realtek LAN Controller item to
[Enabled].
Realtek PXE OPROM [Disabled]
Allows you to enable or disable the PXE OptionRom of the Realtek LAN controller.
Configuration options: [Enabled] [Disabled]
Serial Port Configuration
The sub-items in this menu allow you to set the serial port configuration.
This item functions only if there is a serial port (COM) connector on the motherboard.
Serial Port [Enabled]
Allows you to enable or disable the serial port (COM). Configuration options: [Enabled]
[Disabled]
Change Settings [IO=3F8h; IRQ=4]
Allows you to select the Serial Port base address. Configuration options: [IO=3F8h;
IRQ=4] [IO=2F8h; IRQ=3] [IO=3E8h; IRQ=4] [IO=2E8h; IRQ=3]