MSI 915GVM3-V Manuel D'instructions page 18

Spread Spectrum
When the motherboard'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, select the desired range for EMI reduction.
Remember to disable Spread Spectrum function 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.
Adjust CPU FSB Frequency
This item allows you to select the CPU Front Side Bus clock frequency (in MHz) and overclock
the processor by adjusting the FSB clock to a higher frequency.
Adjusted CPU Clock
It shows the adjusted clock of the CPU. Read-only.
Adjust DDR Memory Frequency
This item allows you to select the DDR memory frequency (in MHz) and overclock
the processor by adjusting the DDR memory to a higher frequency.
Adjusted DDR Memory Frequency
It shows the adjusted frequency of the DDR memory. Read-only.
Adjust DDR Voltage (V)
Adjusting the DDR voltage can increase the DDR speed. Any changes made to this setting may
cause a stability issue, so changing the DDR voltage for long-term purpose is NOT
recommended.
Adjust PCIE Voltage (V)
The PCI Express voltage is adjustable in the field, allowing you to increase the performance of
your graphics card when overclocking. Note that any changes made to this setting may cause a
stability issue.
Adjust NB Voltage (V)
The voltage of the Northbridge chipset is adjustable in this field, allowing you to increase the
performance of the Northbridge when overclocking. Note that any changes made to this setting
may cause a stability issue.
Load Optimized Defaults
You can load the default values provided by the mainboard manufacturer for stable performance.
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