Acer Aspire X1420G Acer Aspire X1400 and X1420 Desktop Series Service Guide - Page 25

Frequency/Voltage Control Field Enable Clock to All DIMM/ PCI Spread Spectrum Description When enabled, clock signals will be sent to the PCI and memory slots regardless of whether the slot is occupied or not. When the mainboard's clock generator pulses, the extreme values of the pulses creates EMI (electromagnetic interference). Set this field to Enabled to reduce this EMI level. This reduces interference problems with other electronics in the area. Note: Remember to disable the Spread Spectrum feature if you are overclocking. A slight jitter can introduce a temporary boost in clock speed causing the overclocked processor to lock up. Value Enabled Disabled Enabled Disabled Aspire AX1400 Service Guide 17