Supermicro 2042G-72RF4, User Manual

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Chapter 7: BIOS
7-7
IOMMU
This setting is used to disable or set the GART size in systems without AGP.
Options include Enabled and
Disabled .
LRDIMM Enhancement
Tis setting Enables or
Disables
LRDIMM enhancement for your system.
Memory Performance Mode
This sets Memory Performance Mode to either Enabled or Disabled.
Memory Timing Parameters
This selects the which node's timing parameters to display. The only selection
for this option is
CPU Node 0 .
Clock Speed Information
Clock speed information for memory is also displayed under this Northbridge
Chipset Confirguration page.

SouthBridge Chipset Configuration
OHCI/EHCI HC Device Functions
These settings allow you to either Enable or Disable functions for OHCI or EHCI
bus devices.
USB 2.0 Controller Mode
Use this setting to configure the USB 2.0 Controller in either Hi-Speed (480 Mps)
or Full Speed (12 Mps) mode.
Legacy USB Support
This setting enables support for any legacy USB in your system. Options include
Enabled, Disabled and
Auto . The Auto option disables legacy support if no USB
device are connected.
BIOS EHCI Hand-Off
This setting is a workaround for OS systems without EHCI hand-off support. The
EHCI ownership change should claim by EHCI driver. Options are
Enabled or
Disabled.
Port 64/60 Emulation
Use this setting to Enable or Disable Port 64/60 Emulation for your system.