MSI KM4M User Guide - Page 57
Frequency/Voltage Control - ms 6734 motherboard
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MS-6734 M-ATX Mainboard Frequency/Voltage Control Use this menu to specify your settings for frequency/voltage control. Auto Detect DIMM/PCI Clk This option allows you to enable/disable the feature of auto detecting the clock frequency of the installed DIMM/PCI bus. 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 temporary boost in clockspeed which may just cause your overclocked processor to lock up. Options: Disabled, +/-0.25%, +/-0.35%, +/-0.50%, +/-0.75%. 3-24