User's Manual

J3455I-CM-A
2-12
2.6.2 Internal connectors
CAUTION: Do not forget to connect the fan cables to the fan headers.
Insufcient air flow inside the system may damage the motherboard
components. These are not jumpers! Do not place jumper caps on the fan
headers!
1. CPU and chassis fan headers (4-pin CPU_FAN, 4-pin CHA_FAN)
Connect the fan cables to the fan headers on the motherboard, ensuring that
the black wire of each cable matches the ground pin of the header.
A B
A
B
CPU_FAN
CHA_FAN
FAN_PWM
FAN_IN
12V
GND
Connector type WAFER HD 4p, 2.54mm pitch, S/T
2. USB 3.2 Gen 1 header (20-1 pin U32G1_12)
Connect a USB 3.2 Gen 1 module to this header for additional USB 3.2
Gen 1 front or rear panel ports. This header complies with USB 3.2 Gen
1 specications and provides faster data transfer speeds of up to 5 Gbps,
faster charging time for USB-chargeable devices, optimized power efciency,
and backward compatibility with USB 2.0.
U32G1_12
+5V_USB3_P12
S_U3RXDN1
S_U3RXDP1
GND
S_U3TXDN1
S_U3TXDP1
GND
S_U2DN1
S_U2DP1
GND
PIN 1
+5V_USB3_P12
S_U3RXDN2
S_U3RXDP2
GND
S_U3TXDN2
S_U3TXDP2
GND
S_U2DN2
S_U2DP2
Connector type BOX HD 2x10p, K20, 2.0mm pitch