Instruction manual

3-27
BIOS Setup
Cell Menu
Adjust CPU Ratio
This item allows you to adjust the CPU ratio. Setting to [Startup] enables the
CPU running at the fastest speed which is detected by system.
Auto Disable PCI Clock
This item is used to auto detect the PCI slots. When set to [Enabled], the
system will remove (turn off) clocks from empty PCI slots to minimize the
electromagnetic interference (EMI). Settings: [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.
Important
1. 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, select the value of Spread Spectrum
for EMI reduction.
2. The greater the Spread Spectrum value is, the greater the EMI
is reduced, and the system will become less stable. For the
most suitable Spread Spectrum value, please consult your
3. Remember to disable Spread Spectrum if you are overclocking
because even a slight jitter can introduce a temporary boost
in clock speed which may just cause your overclocked pro-
cessor to lock up.