Frequency/Voltage Control - MSI P4M900M2 Series User Manual

M S-7255 M ainboard

Frequency/Voltage Control

The items here includes some important settings of CPU and PCI functions.
Important
Change these settings only if you are familiar with the chipset.
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,
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 tempo-
rary 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 Frequency
Indicates the adjusted CPU clock
DRAM Frequency
This setting allows you to set the bus frequency for installed DRAM.
3-16
Important