MSI G41M-P34 - Manual (Page 26)

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important
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.
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.
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.
Load optimized defaults
you can load the default values provided by the mainboard manufacturer for
the stable performance.
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