Asus TUF X299 MARK 2 Manual page 32

5. USB 2.0 connector (10-1 pin USB1314)
This connector is for USB 2.0 ports. Connect the USB module cable to this connector,
then install the module to a slot opening at the back of the system chassis. This USB
connector complies with USB 2.0 specification that supports up to 480 Mb/s connection
speed.
6. Thermal sensor connector (2-pin T_SENSOR)
These connectors are 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.
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Chapter 1: Product Introduction