Gigabyte GA-990FX-Gaming User Manual page 19

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13) COMA (Serial Port Header)
The COM header can provide one serial port via an optional COM port cable. For purchasing the optional
COM port cable, please contact the local dealer.
9
1
10
2
14) TPM (Trusted Platform Module Header)
You may connect a TPM (Trusted Platform Module) to this header.
1
19
20
2
15) BAT (Battery)
level, or the CMOS values may not be accurate or may be lost.
Always turn off your computer and unplug the power cord before replacing the battery.
an incorrect model.
Contact the place of purchase or local dealer if you are not able to replace the battery by yourself
or uncertain about the battery model.
When installing the battery, note the orientation of the positive side (+) and the negative side (-)
of the battery (the positive side should face up).
Used batteries must be handled in accordance with local environmental regulations.
Pin No.
Pin No.
1
6
NSIN
2
7
NSOUT
3
8
4
9
5
10
Pin No.
Pin No.
1
LCLK
11
2
12
3
13
4
No Pin
14
5
15
6
NC
16
7
17
8
18
9
VCC3
19
10
20
You may clear the CMOS values by removing the battery:
1. Turn off your computer and unplug the power cord.
2. Gently remove the battery from the battery holder and wait for one minute. (Or use
a metal object like a screwdriver to touch the positive and negative terminals of the
battery holder, making them short for 5 seconds.)
3.
4. Plug in the power cord and restart your computer.
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NCTS-
No Pin
NC
NC
SB3V
NC
NC
SUSCLK

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