ECS PF21 Extreme User Manual page 45

Example: CPU Clock Ratio
CPU Clock
Installed CPU Clock Speed
AGP Voltage [1.500 V]
This item regulates the voltage delivered to the AGP.
CPU Voltage Control [By Auto]
If you are manually configuring the CPU clock, use this item to set the CPU
voltage for more stability. But we recommend the users keep this item to By
Auto.
Auto Detect PCI Clk [Enabled]
When this item is enabled, BIOS will disable the clock signal of free PCI slots.
Spread Spectrum [Disabled]
If you enable spread spectrum, it can significantly reduce the EMI (Electro-Magnetic
Interference) generated by the system.
PCI Clock [Asyn]
This item correlates to CPU Clock item; when set to Asyn, PCI Clock and CPU Clock
will not operate at the same clock; when set to Sync, PCI Clock and CPU Clock will
operate at the same clock.
CPU Clock[200MHz]
This item allows you to adjust the CPU clock to 200MHz. You can key-in the numbers
within the range to make a precise and ideal adjustment.
3-18
Async PCIE Clock [CPU Clock/2]
8
X200
This item correlates to CPU Clock item; when set to Asyn, PCIE Clock and CPU Clock
will not operate at the same clock; when set to Sync, PCI Clock and CPU Clock will
1600 MHz
operate at the same clock.