Chapter 3 BIOS Setup
24
EPE1814V2NAR
Ø
CPU Feature
CPU Feature
PPM Mode [Native Mode]
Limit CPUID MaxVal [Disabled]
C1E Function [Auto]
Execute Disable Bit [Enabled]
Virtualization Technology [Disabled]
Core MultiProcessing [Enabled]
Item Help
Menu Level
Native Mode is for fully
support ACPI OS
(ex.WINXP, VISTA...),
SMM mode is for legacy
OS (ex. Win2K)
l
PPM Mode
That is EIST (Enhanced Intel Speedstep Technology); it is a module to adjust
the basic frequency and voltage according to the load of the processor, which
requires supports from both OS and BIOS; system will adjust via ACPI.
Speedstep Technology provides more adjusting levels for CPU frequency and
voltage; therefore, it could adjust the status of the processor more accurately
than C1E.
Native Mode: applied in the OS supporting ACPI completely, such as: WINXP,
and VISTA (Default)
SMM Mode: applied in the traditional OS, such as: WIN2000.
l
Limit CPUID MaxVal
This option could be enabled to support the maximum limitation function of
CPUID in former operating system, so as to prevent CPU from returning a value
above 3 after implementing CPUID command and cause system error.
Disabled: this option shall be disabled under WINXP system. (Default)
Enabled
l
C1E Function
The function of this option is similar with that of EIST. When enabled, it could
make the unloaded CPU operate under the lowest frequency multiplication
supported by CPU. However, from power saving point of view, the effect is no
better than EIST option.
