Asus Prime X399-A User Manual page 34

5. USB 2.0 connectors (10-1 pin USB12; USB34)
These connectors are for USB 2.0 ports. Connect the USB module cable to any of
these connectors, then install the module to a slot opening at the back of the system
chassis. These USB connectors comply with USB 2.0 specification that supports up to
480 Mb/s connection speed.
PRIME X399-A USB 2.0 connectors
6. Thermal sensor connector (2-pin T_SENSOR)
This connector is for the thermistor cable that monitors the temperature of the devices
and the critical components inside the motherboard. Connect the thermistor cable
and place the sensor on the device or the motherboard's component to detect its
temperature.
PRIME X399-A Thermal sensor connector
1-20
USB12 USB34
PIN 1 PIN 1
T_SENSOR
PIN 1
Chapter 1: Product Introduction