XFX 650I - Manual (Page 68)

Installing and Configuring the XFX nForce 650i Ultra Motherboard
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MAC Config
Press Enter to display the MAC Config menu.
MACx LAN
Use these functions to set the MAC0 and/or MAC1 LANs to
Auto or
disable their functions.
HD Audio
This function on the Integrated Peripherals menu allows you to enable or
disable the hard disk audio function.
IDE HDD Block Mode
Using this function on the Integrated Peripherals menu allows your IDE hard
drive needs to support block mode. Select
[Enabled] to automatically detect
the optimal number of block read/writes per sector the drive can support.
Select
[Disabled] if your drive does not support block mode.
Onboard FDC Controller
This function on the Integrated Peripherals menu allows you to enable or
disable the onboard FDC controller function.
Onboard Serial Port 1
This function on the Integrated Peripherals menu allows you to select the
onboard serial port 1 function. Options are
[3F8/IRQ4] , [2E8/IRQ3] ,
[3E8/IRQ4] , [Auto] , and [Disabled].
MAC0 LAN [Enabled]
MAC1 LAN [Disabled]