Frequency/Voltage Control - MSI 875P Neo Manual

MS-6758 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.
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