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AWARD
®
BIOS Setup
Frequency/Voltage Control
Auto Detect DIMM/PCI Clk
To reduce the occurrence of electromagnetic interference (EMI), the BIOS de-
tects the presence or absence of components in DIMM and PCI slots and
turns off system clock generator pulses to empty slots. 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 Spec-
trum 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 overclocking be-
cause even a slight jitter can introduce a temporary boost in clockspeed which
may just cause your overclocked processor to lock up.
Host CPU/PCI Clock
This setting controls the timing combination for the CPU and the PCI bus.
When set to Default, the BIOS uses the actual CPU and PCI bus clock values.
CPU Clock Ratio
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.
3-27
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