7. USB 2.0 ports 1 and 2. These two 4-pin Universal Serial Bus (USB) ports are for
USB 2.0/1.1 devices.
8. USB 2.0 ports 3 and 4. These two 4-pin Universal Serial Bus (USB) ports are for USB
USB 2.0/1.1 devices.
9. Video Graphics Adapter (VGA) port. This 15-pin port is for a VGA monitor or other
VGA-compatible devices.
10. COM port. This port is for pointing devices or other serial devices.
11. USB 2.0 ports 5 and 6. These two 4-pin Universal Serial Bus (USB) ports are for
USB 2.0/1.1 devices.
1.10.2 Internal connectors
1. CPU and chassis fan connectors (4-pin CPU_FAN and 3-pin CHA_FAN)
Connect the fan cables to the fan connectors on the motherboard, ensuring that the
black wire of each cable matches the ground pin of the connector.
• The CPU_FAN connector supports a CPU fan of maximum 2A (24 W) fan power.
• Only the CPU_FAN connector supports the ASUS Fan Xpert feature.
• If you install two VGA cards, we recommend that you plug the rear chassis fan cable to
the motherboard connector labeled CHA_FAN for better thermal environment.
DO NOT forget to connect the fan cables to the fan connectors. Insufcient air ow inside
the system may damage the motherboard components. These are not jumpers! DO NOT
place jumper caps on the fan connectors.
To congure an 8-channel audio output:
Use a chassis with HD audio module in the front panel to support an 8-channel audio
output.
CPU_FAN
CPU FAN PWM
CPU FAN IN
CPU FAN PWR
GND
GN
D
+12V
Rotation
F1A55-M LX PLUS
F1A55-M LX PLUS fan connectors
CHA_F
AN
ASUS F1A55-M LX Series 1-21
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