Gigabyte GA-8S661FXM-775 Manual - Page 24

F1_USB / F2_USB Front USB Connectors, CI Chassis Intrusion, Case Open

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English 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 2 10 1 Power 1 9 2 Power 3 USB0 DX- 4 USB1 Dy- 5 USB0 DX+ 6 USB1 Dy+ 7 GND 8 GND 9 No Pin 10 NC 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 1 2 GND GA-8S661FXM-775 Motherboard - 24 -

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GA-8S661FXM-775 Motherboard
- 24 -
English
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