Chapter 4: BIOS
4-11
Enhanced Intel Speed Step Support (Available when supported by the CPU)
Select Enabled to use the Enhanced Intel SpeedStep Technology and allow the
system to automatically adjust processor voltage and core frequency in an effort
to reduce power consumption and heat dissipation. The options are Enabled (-C
States, GV1/GV3 are enabled),
GV1/GV3 Only
(C States: Disabled), C-States
Only (-G1/G3: Disabled), and Disabled (-C States, GV1/GV3 are disabled). Please
refer to Intel’s web site for detailed information. Please refer to Intel’s web site for
detailed information.
Advanced Chipset Control
Access the submenu to make changes to the following settings.
Warning
: Take caution when changing the Advanced settings. An incor-
rect setting, a very high DRAM frequency, or an incorrect DRAM timing
may make the system to become unstable. When this occurs, reset the
setting to the default setting.
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.
Legacy USB Support
This setting allows you to enable support for Legacy USB devices. The settings
are
Enabled
and Disabled.
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