Asus L1N64-SLI WS - Manual (Page 93)

ASUS LN-SLI WS -
CHA Fan1/Fan2 Speed (RPM) [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 [Ignore] from the item options to disable chassis
fan speed monitoring.
SPS Fan/HP Fan3 Speed (RPM) [xxxxRPM] or [N/A] or [Ignored]
The onboard hardware monitor automatically detects and displays the SPS/
Heatpipe fan speed in rotations per minute (RPM). If the fan is not connected to
the chassis, the specific field shows N/A. Select [Ignore] from the item options to
disable chassis fan speed monitoring.
VCORE1/VCORE2 Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage
The onboard hardware monitor automatically detects the voltage output through
the onboard voltage regulators.