Asus TS100-E5/PI4 - Manual (Page 83)

ASUS TS100-E5/PI4 4-27
Front_Fan1/2/3 Fan Speed [xxxxRPM] or [N/A] or [Ignored]
Rear_Fan1 Speed [xxxxRPM] or [N/A] or [Ignored]
The onboard hardware monitor automatically detects and displays the chassis fan speed
in rotations per minute (RPM). If the fan is not connected to the chassis, the specific field
shows N/A. Select [Ignored] if you do not wish to display the detected speed.
VCORE Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage, VBAT Voltage,
and 3VSB Voltage
The onboard hardware monitor automatically detects the voltage outputs through
the onboard voltage regulators.