Abit SI-2PS User Manual page 45

BIOS Setup 3-19
CPU FanEQ Speed Control
This item allows you to control the CPU fan speed down to a specific percentage.
When set to a specific percentage, the CPU fan speed will run at the percentage you
set in this item if the temperature limit set in the item "Active Temperature" is not
exceeded.
The CPU fan speed will run at 100% regardless of what the percentage you set in this
item if the temperature limit set in the item "Active Temperature" is exceeded.
Active Temperature
This item sets the temperature limit that would activate the function of "CPU FanEQ
Speed Control" option.
All Voltages, Fans Speed and Thermal Monitoring
These unchangeable items list the current status of the CPU and environment
temperatures, fan speeds, and system power voltage.
NOTE: The hardware monitoring features for temperatures, fans and voltages will
occupy the I/O address from 294H to 297H. If you have a network adapter, sound
card or other add-on cards that might use those I/O addresses, please adjust your
add-on card I/O address to avoid using these addresses.
User's Manual