Supermicro SUPERO X8DTN+ User Manual page 75

Chapter 4: AMI BIOS
Active State Power-Management
Select enable to confi gure the power states of PCI-Express L0s and L1 links. The
options are Enabled and Disabled.
IOH PCIE Max Payload Size
Some add-on cards perform faster with the coalesce feature, which limits the
payload size to 128B; while others, with a payload size of 256B which inhibits the
coalesce feature. Please refer to your add-on card user guide for the desired set-
ting. The options are 256B and 128MB.
South Bridge Confi guration
This feature allows the user to confi gure the settings for the Intel South Bridge.
USB Functions
This feature allows the user to decide the number of onboard USB ports to be
enabled. The Options are: Disabled, and Enabled. (If this item is set to Enabled,
USB 2.0 Controller will be enabled.)
Legacy USB Support
Select Enabled to use Legacy USB devices. If this item is set to Auto, Legacy USB
support will be automatically enabled if a legacy USB device is installed on the
motherboard, and vise versa. The settings are Disabled, Enabled and Auto.
USB 2.0 Controller
Select Enabled to activate USB 2.0 Controller. The options are Enabled and Dis-
abled. (Note: If the item - USB Functions is enabled, USB 2.0 Controller will always
be enabled. When the item - USB Functions is set to Disabled, the user has the
option to enable or disable USB 2.0 Controller.)
USB 2.0 Controller Mode
This setting allows you to select the USB 2.0 Controller mode. The options are
Hi-Speed (480 Mbps) and Full Speed (12 Mbps).
BIOS EHCI Hand-Off
Select Enabled to enable BIOS Enhanced Host Controller Interface support to
provide a workaround solution for an operating system that does not have EHCI
Hand-Off support. When enabled, the EHCI Interface will be changed from the BIOS-
controlled to the OS-controlled. The options are Disabled and Enabled.
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