MSI P45 Neo3 Series Manual page 43

CPU CLK Skew/ M CH CLK Skew
These items are used to select the CPU/ North Bridge chipset clock skew.
They can help CPU to reach the higher overclocking performace.
Adjust PCI Frequency (MHz)
This field allows you to select the PCI frequency (in MHz).
Auto Disable DRAM /PCI Frequency
W hen set to [Enabled], the system will remove (turn off) clocks from empty DIMM
and PCI slots to minimize the electromagnetic interference (EMI).
CPU Voltage (V)/ CPU GTL REF0 / CPU GTL REF1 / DRAM Voltage (V)/ MCH
Voltage (V)/ MCH GTL REF / VTT FSB Voltage (V)/ ICH Voltage (V)
These items are used to asjust the voltage of CPU, Memory, FSB and chipset.
Spread Spectrum
W hen the mainboard's clock generator pulses, the extreme values (spikes) of the
pulses create 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, set to Enabled for EMI reduction. 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.
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.
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