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GA-8S661FXM-775 Motherboard - 24 -
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13) F1_USB / F2_USB (Front USB Connectors)
Be careful with the polarity of the front USB connector. Check the pin assignment carefully while
you connect the front USB cable, incorrect connection between the cable and connector will make
the device unable to work or even damage it. For optional front USB cable, please contact your
local dealer.
Pin No. Definition
1 Power
2 Power
3 USB0 DX-
4 USB1 Dy-
5 USB0 DX+
6 USB1 Dy+
7 GND
8 GND
9 No Pin
10 NC
1
9
2
10
14) CI (Chassis Intrusion, Case Open)
This 2-pin connector allows your system to detect if the chassis cover is removed. You can
check the "Case Open" status in BIOS Setup.
Pin No. Definition
1 Signal
2 GND
1
1