Chapter 4: BIOS
4-13
SouthBridge/MCP55 Confi guration
CPU/LDT Spread Spectrum
Enables spread spectrum for the CPU/LDT. Options are
Center Spread
, Down
Spread or Disabled.
PCIE Spread Spectrum
Allows you to
Enable
or Disable spread spectrum for PCI-Express.
SATA Spread Spectrum
Enables spread spectrum for the SATA. Options are
Enabled
and Disabled.
Primary Graphics Adapter
Options are
PCI Express
PCI
and PCI
PCI Express.
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 fi eld 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 hand-off support.
