MSI RS480M - Manual (Page 64)

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MS-7145 M-ATX Mainboard
Ratio Change
This field allows you to select the CPU Ratio. Setting to [Auto] enables CPU Ratio
automatically to be determined by SPD. Setting options: [Auto], [Manual].
Adjust CPU Ratio
W hen the Ratio Change is set to [Manual], the field is adjustable. This item allows
you to adjust the CPU ratio. It is available only when the processor supports this
function.
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). Settings: [Enabled], [Disabled].
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. Setting options: [Disabled], [Enabled].
MSI Reminds You...
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 Enabled of Spread Spectrum for EMI reduction.
2. Remember to disable Spread Spectrum if you are overclocking be-
cause even a slight jitter can introduce a temporary boost in clock
speed which may just cause your overclocked processor to lock up.