Asus H170-PLUS D3 Manual page 30

8. CPU and chassis fan connectors (4-pin CPU_FAN, 4-pin CHA_FAN 1/2)
black wire of each cable matches the ground pin of the connector
H170-PLUS D3 Fan connectors
1-20
A
B
C
H170-PLUS D3
A B
CPU_FAN CHA_FAN1
C
CHA_FAN2
GND
CHA FAN PWR
CHA FAN IN
+5V
Chapter 1: Product introduction