User Guide

2-18 Chapter 2
2.CPU Voltage and Setup (SW2)
For the voltage of the 586 series CPU, there are two kinds of operation
modes depending on the different CPUs; single voltage and dual voltage.
Please make sure which kind of CPU and the working voltage that you
use before installation. The following table presents all of the
adjustments of voltage for all of the 586 series CPUs, Please setup the
Vcore voltage if the CPU you are using is single voltage.
SW2 CPU Vcore / Vio settings
VCORE VIO
Vcore/Vio VC1 VC2 VC3 VC4 VC5 VC6 VC7 VC8
3.5/3.3
ON ON ON ON OFF OFF ON OFF
3.4/3.3
OFF ON ON ON OFF OFF ON OFF
3.3/3.3
ON OFF ON ON OFF OFF ON OFF
3.2/3.38
OFF OFF ON ON OFF OFF OFF ON
2.9/3.38
ON OFF OFF ON OFF OFF OFF ON
2.8/3.38
OFF OFF OFF ON OFF OFF OFF ON
2.7/3.38
ON ON ON OFF OFF OFF OFF ON
2.6/3.38
OFF ON ON OFF OFF OFF OFF ON
2.5/3.38
ON OFF ON OFF OFF OFF OFF ON
2.4/3.38
OFF OFF ON OFF OFF OFF OFF ON
2.3/3.38
ON ON OFF OFF OFF OFF OFF ON
2.2/3.38
OFF ON OFF OFF OFF OFF OFF ON
2.1/3.38
ON OFF OFF OFF OFF OFF OFF ON
2.0/3.38
OFF OFF OFF OFF OFF OFF OFF ON
¡i Note ¡j The Vcore of CPU voltage is designed using a switching power
supply, the Vio of CPU voltage is designed using a linear regulator
power supply. That means Vcore can provide more current and
voltage drop without creating more heat and high temperatures.
The linear power supply will create more heat and higher
temperatures.
Please setup the Vio voltage less than Vcore voltage if the single
voltage CPU is installed, it is used to make sure the CPU voltage is
provided by Vcore (Switching Power Supply), and make the CPU
more stable.