SOYO SY-P4I845PEISA - Manual (Page 46)

BIOS Setup Utility SY-P4I845PEISA/GEISA
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3-1 FREQUENCY/VOLTAGE SETUP
This Motherboard does not use any hardware jumpers to set the CPU
frequency. Instead, CPU settings are software configurable with the BIOS
[Frequency/Voltage Control].
After the hardware installation is complete, turn the power switch on, then
press the <DEL> key during the system diagnostic checks to enter the
Award BIOS Setup program. The CMOS SETUP UTILITY will display on
screen. Then, select the [Frequency/Voltage Control] option from the main
menu and press the <Enter> key.
Phoenix – Award BIOS CMOS Setup Utility
Frequency/Voltage Control
CPU Clock Ratio 20 x Item Help
C.I.H. 4-WAY Protection Disabled
Onboard LAN Enabled
Auto Detect PCI Clk Disabled
Spread Spectrum Disabled
Menu Level 
Move Enter : Select + / - / PU / PD : Value F10 : Save ESC : Exit F1: General Help
F5 : Previous Values F6 : Fail – Safe Defaults F7 : Optimized Defaults
The [Frequency/Voltage Control] menu combines the main parameters that
you need to configure, all in one menu, for a quick setup in BIOS.