Asus DN-300-R2 Manual page 22

4. CPU and PSU fan connectors (4-pin CPU_FAN, 3-pin PSU_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.
DN-300-R2 Fan connectors
CAUTION: Do not forget to connect the fan cables to the fan connectors.
Insufficient air flow inside the system may damage the motherboard
components. These are not jumpers! Do not place jumper caps on the fan
connectors!
5. TPM connector (14-1 pin TPM)
This connector supports a Trusted Platform Module (TPM) system, which can
securely store keys, digital certificates, passwords, and data. A TPM system
also helps enhance network security, protects digital identities, and ensures
platform integrity.
DN-300-R2 TPM connector
2-16
A
PSU_FAN
PIN1
A
B
CPU_FAN
PIN1
B
TPM
PIN 1
DN-300-R2