MSI 865PE NEO2-PFS User Guide - Page 83

Frequency/Voltage Control

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MS-6728 ATX Mainboard Frequency/Voltage Control Use this menu to specify your settings for frequency/voltage control. CPU Ratio Selection This setting controls the multiplier that is used to determine the internal clock speed of the processor relative to the external or motherboard clock speed. DRAM Frequency Use this field to configure the clock frequency of the installed DRAM. Settings are: PSB 400: 266, Auto. PSB 533: 266, 333, Auto, 354. PSB 800: 266, 333, 400, Auto, 500, 532. 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 No for optimal system stability and performance. But if you are plagued by EMI, setting 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 clockspeed which may just cause your overclocked processor to lock up. 3-28

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3-28
MS-6728 ATX Mainboard
Use this menu to specify your settings for frequency/voltage control.
CPU Ratio Selection
This setting controls the multiplier that is used to determine the internal clock
speed of the processor relative to the external or motherboard clock speed.
DRAM
Frequency
Use this field to configure the clock frequency of the installed DRAM. Settings
are:
PSB 400:
266, Auto.
PSB 533:
266, 333, Auto, 354.
PSB 800:
266, 333, 400, Auto, 500, 532.
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
No
for optimal system stability and performance.
But if you are plagued by EMI, setting 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 clockspeed which may just cause your
overclocked processor to lock up.
Frequency/Voltage Control