User`s manual

3-27
BIOS Setup
Auto Disable PCI Clk
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 inter-
ference (EMI).
Spectrum Configuration
Press <Enter> to enter the sub-menu and the following screen appears.
CPU Spread Spectrum
This setting is used to enable or disable the CPU Spread Spectrum feature.
When overclocking the CPU, always set it to [Disabled].
C51 PCIE Spread Spectrum
This setting is used to enable or disable the C51 PCIE Spread Spectrum feature.
CPU/LDT Spread Spectrum
This setting is used to enable or disable the CPU/LDT (HT Bus multiplier) Spread
Spectrum feature.
MCP55 PCIE Spread Spectrum
This setting is used to enable or disable the MCP55 PCIE Spread Spectrum
feature.
SATA Spread Spectrum
This setting is used to enable or disable the SATA Spread Spectrum feature.
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 local EMI regulation.
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 processor to lock up.
Important