Chapter 4: BIOS
Power Down Control
Allows DIMMs to enter power down mode by deasserting the clock enable signal when DIMMs are not in use. Options are Auto and Disabled.
Alternate VID
Specifies and alternate VID while in low power states. Options are Auto and various voltages between .8V and 1.115V.
Memory Timing Parameters
Allows the user to select which CPU Node's timing parameters (memory clock, etc.) to display. Options are CPU Node 0, CPU Node1, CPU Node2 and CPU Node3.
SouthBridge Configuration
USB 1.1 Controller
Enable or disable the USB 1.1 controller.
USB 2.0 Controller
Enable or disable the USB 2.0 controller.
USB Devices Enabled
This field dsiplays the USB devices currently enabled.
Legacy USB Support
Select "Enabled" to enable the support for USB Legacy. Disable Legacy support if there are no USB devices installed in the system. "Auto" disabled Legacy support if no USB devices are connected. The options are Disabled, Enabled and Auto.
USB 2.0 Controller Mode
Select the controller mode for your USB ports. Options are HiSpeed and FullSpeed. (HiSpeed=480 Mbps, FullSpeed=12 Mbps).
BIOS EHCI Hand-Off
Enable or Disable a workaround for OS's without EHCI
