Parameters of System State

All modern motherboards are equipped with special sensors which control the supply voltage, temperature of main components and other parameters. You can find the current values of operating voltage and temperature in a section “BIOS Hardware Monitor (H/W Monitor)” or “PC Health Status”.


Most motherboards control the temperature of processor and chipset but some of them also control the temperature of the power supply. These parameters may have the following names:

  • CPU Temperature – the processor temperature;
  • System Temperature (MB Temperature) – the chipset temperature;
  • PWM Temperature (Power Temperature) – the power supply temperature.

Except operating temperatures, all motherboards control the supply voltages which can be divided into two groups:

  • the voltage produced by the power supply: 3.3 V, +5 V, +12 V, -12 V and 5 V SB (power voltage of stand-by mode);
  • the voltages produced by adjustable stabilizers on a motherboard. They are used for supplying power to the processor (CPU Voltage or Vcore), chipset (Chipset Voltage), memory (DIMM Voltage) and other components.

The parameter “Voltage Battery” displays the voltage on the power voltage CMOS and system clock.

The last group of informational parameters displays the fan speed of processor, chipset and other components. These parameters may have the following names:

  • CPU Fan Speed (Current CPU FAN Speed (RPM)) – the fan speed of processor;
  • Chassis Fan Speed (Current SYSTEM FAN Speed (RPM)) – the fan speed of chipset;
  • Power Fan Speed – the fan speed of power supply.