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Chapter 3
3-30
Frequency/Voltage Control
This section describes how to set the Chassis Intrusion feature, CPU FSB
frequency, monitor the current hardware status including CPU/system
temperatures, CPU/System Fan speeds, Vcore etc. Monitor function is avail-
able only if there is hardware monitoring mechanism onboard.
Auto Detect PCI/DIMM Clk
This option allows you to enable/disable the feature of auto detecting the
clock frequency of DIMM and PCI bus. The settings are: Enabled, Disabled.
Spread Spectrum
When the motherboards clock generator pulses, the extreme values (spikes)
of the pulses creates EMI (Electromagnetic Interference). The Spread Spec-
trum 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, change the setting for EMI
reduction. Remember to disable Spread Spectrum if you are overclocking be-
cause even a slight jitter can introduce a temporary boost in clockspeed which
may just cause your overclocked processor to lock up. Options: Disabled,
-1.50%, -1.00%, -0.70%, -0.50%, +/-0.25%, +/-0.35%, +/-0.50%, +/-0.75%.
CPU/PCI Clock
This setting controls the clock frequency of the CPU/PCI bus on the
motherboard. Options: Default.