Frequency/Voltage Control - MSI 848PM User Manual

MS-7037 M-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.
Auto Detect PCI Clk
This feature enables the BIOS to auto detect PCI device and set PCI slot clock. The
settings are: [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,
activate the Spread Spectrum for EMI reduction. Remember to disable Spread
Spectrum 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. Options: [Disabled], [Enabled].
CPU Clock
This item specifies the clock frequency of CPU host bus (FSB), AGP (3V66) and PCI
bus. It provides a method for end users to overclock the processor. Setting options:
Give a DEC value by entering a number between maximum [233] MHz to minimum
[100] MHz.
AGP/PCI Clock
AGP/PCI clock is adjustable in the field, allowing you to increase the performance of
your AGP display card when overclocking, but the stability may be affected.
AGP Power Voltage
AGP voltage is adjustable in the field, allowing you to increase the performance of
your AGP display card when overclocking, but the stability may be affected.
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