ASROCK PRO Series User Manual page 44

CPU Fan Connector
(4-pin CPU_FAN1) (see p.6, No. 2)
This motherboard provides a 4-Pin CPU fan (Quiet Fan) connector. If you plan to
connect a 3-Pin CPU fan, please connect it to Pin 1-3.
ATX Power Connector
(24-pin ATXPWR1) (see p.6, No. 7)
This motherboard provides a 24-pin ATX power connector. To use a 20-pin ATX
power supply, please plug it along Pin 1 and Pin 13.
CPU_FAN1
4 3 2 1
GND
+12V
CPU_F AN_SPEED
FAN_SPEED_CONTROL
ATXPWR1
12 24
1 13
B550M Pro SE
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