Frequency/Voltage Control - Acer Aspire SA90 Service Manual

Frequency/Voltage Control

Auto Detect DIMM/PCI Clk
Spread Spectrum
:Move Enter: Select +/-/ :Value F10:Save ESC:Exit F1:General Help
The following table describes the parameters found in this menu. Settings in boldface are the default and
suggested settings.
Parameter
Auto Detect DIMM/PCI Clk
Spread Spectrum
when your hardware does not support them. If you only want to install setup defaults for a specific option,
select and display that option.
31
Phoenix - AwardBIOS CMOS Setup Utility
Frequency/Voltage Control
[Enabled]
[Enabled]
F5:Previous Values F7:Optimized Defaults
Description
This option allows you to enable/disable the
feature of auto detecting the clock frequency of
the installed PCI bus.
When the motherboard's clock generator pulses,
the extreme values (spikes) of the pulses creates
EMI (Electromagnetic Interference). The spread
Spectrum function reduces the EMI generated by
modulating the pulses so that the spikes of the
pulses are reduced to flatter curves. If you do not
have any EMI problem, leave the setting at
Disabled for optimal system stability and
performance. But if you are plagued by EMI,
setting to Enabled for EMI reduction. Remember
to disable Spread Spectrum if you are
overlocking because even a slight jitter can
introduce a temporary boost in clockspeed which
may just cause your overlock ed processor to
lock up.
Help Item
Options
Enabled
Disabled
Enabled
Chapter 2