MSI 945GM3-F User Manual page 58

Adjust PCI Express Frequency
This item allows you to select the PCI Express clock frequency (in MHz) and overclock
the processor by adjusting the PCI Express clock to a higher frequency.
Adjust PCI Frequency
This item allows you to select the PCI clock frequency (in MHz) and overclock the
processor by adjusting the PCI clock to a higher frequency.
Adjust NB Voltage (V)
These item adjusts the voltage of North Bridge Voltage. Any changes made to this
setting may cause a stability issue, so changing the NB voltage for long-term
purpose is NOT recommended.
Auto Disable PCI Clock
This item is used to auto detect the PCI slots. W hen set to [Enabled], the system will
remove (turn off) clocks from empty PCI slots to minimize the electromagnetic inter-
ference (EMI).
Spread spectrum
W hen 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.
Important
1. 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, select the
value of Spread Spectrum for EMI reduction.
2. The greater the Spread Spectrum value is, the greater the EMI is reduced, and
the system will become less stable. For the most suitable Spread Spectrum
value, please consult your local EMI regulation.
3. Remember to disable Spread Spectrum if you are overclocking because even
a slight jitter can introduce a temporary boost in clock speed which may just
cause your overclocked processor to lock up.
BIOS Setup
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