CPU and Chassis Fan connectors Asus prime Asus M3A78-EH

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Chapter 1: Product introduction

5.  CPU and Chassis Fan connectors 

(4-pin CPU_FAN, 3-pin CHA_FAN)
The fan connectors support cooling fans of 350mA~740mA (8.88W max.) or 

a total of 1A~2.22A (26.64W max.) at +12V. Connect the fan cables to the 

fan connectors on the motherboard, making sure that the black wire of each 

cable matches the ground pin of the connector.

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.

Only CPU Fan supports Q-Fan.

R

M3A78-EH

M3A78-EH Fan Connectors

CPU_FAN

GN

D

CPU 

FA

N PW

R

CPU 

FA

N IN

CPU 

FA

N PW

M

CHA_FAN

GN

D

Rotation

+12V