User`s manual

4-10
X7SB3/X7SB3-F User's Manual
XAdvanced Chipset Control
Access the submenu to make changes to the following settings.
Warning: Take caution when changing the Advanced settings. Any in-
correct setting, inaccurate DRAM timing, or high DRAM frequency may
make the system unstable. When this occurs, reset the setting to the
default setting.
Clock Spectrum Feature
When set to Enabled, the BIOS will monitor the level of Electromagnetic Interference
caused by the components and will attempt to decrease the interference whenever
needed. The options are Enabled and Disabled.
Memory Remapping
Select Enable to use the functionality of Memory Remapping above 4GB. The
settings are Enabled and Disabled.
Enable VT-d
Select Enable to enable the functionality of the Intel Virtualization Technology for
Direct I/O support, which offers fully-protected I/O resource-sharing across the
Intel platforms, providing the user with greater reliability, security and availability in
networking and data-sharing. The settings are Enabled and Disabled.
High Precision Event Time
Select Yes to activate the High Precision Event Timer (HPET), which is capable of
producing periodic interrupts at a much higher frequency than a Real-time Clock
(RTC) can in synchronizing multimedia streams, providing smooth playback and
reducing the dependency on other timestamp calculation devices, such as an x86
RDTSC Instruction embedded in a CPU. The High Precision Event Timer is used
to replace the 8254 Programmable Interval Timer. The options for this feature are
Yes and No.
Route Port 80h Cycles to
This feature allows the user to decide which bus to send debug information to. The
options are Disabled, PCI and LPC.
USB Host Controller
Select Enabled to enable the onboard USB Host Controllers. The options are
Enabled and Disabled.
EHCI Controller
Select Enabled to use the EHCI (Enhanced Host Controller Interface Specifi cation)
for USB connections. The options are Enabled and Disabled.