MSI 915GM-FR User Manual - Page 59

Frequency/Voltage Control

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Page 59 highlights

M S-7033 M -ATX M ainboard Frequency/Voltage Control Use this menu to specify your settings for frequency/voltage control. Current CPU Clock It shows the current clock frequency of CPU. (Read-only) Adjust CPU Ratio End users can overclock the processor (only if the processor supports so) by specifying the CPU ratio (clock multiplier) in this field. Setting options: Min: [8], Max: [50]. Auto Detect PCI Clk 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 interference (EMI). Setting options: [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. 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. Setting options: [Enabled], [Disabled]. 3-24

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MS-7033 M-ATX Mainboard
Use this menu to specify your settings for frequency/voltage control.
Frequency/Voltage Control
Current CPU Clock
It shows the current clock frequency of CPU. (Read-only)
Adjust CPU Ratio
End users can overclock the processor (only if the processor supports so) by speci-
fying the CPU ratio (clock multiplier) in this field. Setting options: Min: [8], Max: [50].
Auto Detect PCI Clk
This item is used to auto detect the PCI slots. When set to [Enabled], the system will
remove (turn off) clocks from empty PCI slots to minimize the electromagnetic interfer-
ence (EMI). Setting options: [Enabled], [Disabled].
Spread Spectrum
When 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. 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. Setting options:
[Enabled], [Disabled].