Acer Aspire SA80 Aspire SA80 and Power S280 Service Guide - Page 68

Frequency Control Phoenix - AwardBIOS CMOS Setup Utilitye Frequency Control CPU Speed 3.06GHz Item Help Auto Detect DIMM/PCI Clk [Enabled] Menu Level X Spread Spectrum [Enabled] KLIJ: Move Enter: Select +/-/PU/PD: Value F10:Save ESC: Exit F1: General Help F5: Previous Values F6: Fail-Save Default F7: Optimized Defaults The following table describes the parameters found in this menu. Settings in boldface are the default and suggested settings. Parameter CPU Speed Auto Detect DIMM/PCI Clk Spread Spectrum Description Options Auto detect the CPU speed from your system This option allows you to enable/disable the feature of auto detecting the clock frequency of the installed PCI bus. Enabled Disabled 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, setting to Enabled for EMI reduction. Remember to disable Spread Spectrum if you are overlocking because even a slight jitter can introduce a temporary boost in clockspeed which may just cause your overlock ed processor to lock up. Enabled 60 Chapter 2