MSI 815 PRO Manual page 42

The mainboard provides a front Universal Serial Bus connector. This is an
optional USB connector for Front Panel.
Pin
1
3
5
7
9
Description Pin
VCC 2
USB2- 4
USB2+ 6
GND 8
GND 10
2-38
10 9
1
2
JUSB1
Description
GND
GND
USB3+
USB3-
VCC