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Chapter 2
HARDWARE INSTALLATION
User's Manual |
GH551
Pin Assignment
1
Ground
2
Power
3
Sense
3-pin Fan Pin Assignment
CPU Fan
X
Internal I/O Connectors
These fan connectors are used to connect to cooling fans. Cooling fans provide adequate air
circulation throughout the chassis and dissipate heat to prevent overheating of the system
board and components. The 3-pin CPU fan modulates fan speed via voltage modulation.
BIOS Setting
Configure the Smart Fans in the Advanced menu (“NCT5525D Super IO Configuration” sub-
menu) of the BIOS. Refer to chapter 3 for more information.
Battery
X
Internal I/O Connectors
The external lithium ion battery supplies power to the real-time clock and CMOS memory as an
auxiliary source of power when the main power is shut off.
Safety Measures
• There exists explosion hazard if the battery is incorrectly installed.
• Replace only with the same or equivalent type recommended by the manufacturer.
• Dispose of used batteries according to local ordinances.
Battery
External Battery
Connect to board
3.3V
2 1
GND
1
2
10
1
5
2
2
1
9
1
1
1
1
2
10
9
1
2
39
40
1
1
1
1
1
1
1
1
9
10
2
2
5
6
1
2
5
6
1
1
1
2
10
1
5
2
2
1
9
1
1
1
1
2
10
9
1
2
39
40
1
1
1
1
1
1
1
1
9
10
2
2
5
6
1
2
5
6
1
1
1
2
10
1
5
2
2
1
9
1
1
1
1
2
10
9
1
2
39
40
1
1
1
1
1
1
1
1
9
10
2
2
5
6
1
2
5
6
1
1