Acer Aspire M5620 Aspire M5620 Service Guide - Page 54

The following table describes the parameters found in this menu: Parameter Auto Detect DIMM/PCI CLK Manufacturer CPU frequency Spread Spectrum Description Options This option allows you to Enabled Disabled enable/disable the feature of auto detecting the clock frequency of the installed PCI bus. This item specifies CPU Intel Manufacturer This item specifies CPU frequency 266MHz When the motherboard's clock Enabled generator pulses, the extreme values (spikes) of the pulses create 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, setting to Enabled for EMI reduction. Remember to disable Spread Spectrum if you are overlooking because even a slight jitter can introduce a temporary boost in clock speed which may just cause your over lock ed processor to lock up. 48