Regarding AB350 Pro4 Chassis Fan

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   Dear tsaybird,

Greetings, this is ASRock TSD.

For AB350 Pro4, there are three chassis fan connector, CHA_FAN1, CHA_FAN2 and CHA_FAN3.
CHA_FAN2 and CHA_FAN3 could control both 3-pin and 4-pin fan, but CHA_FAN1 could only control 4-pin fan.

Regarding your question, please install a 4-pin fan on CHA_FAN1 to customize the fan setting.
If connecting 3-pin fan, it will work at full speed.

Here is the specification for your reference as below.
http://www.asrock.com/MB/AMD/AB350%20Pro4/index.asp#Specification

Besides, please also refer to the following link for the fan type specification and information.
http://www.asrock.com/support/faq.us.asp?id=427

Thanks!

All the best,
ASRock TSD

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ASRock_TSD Members Profile Send Private Message Find Members Posts Add to Buddy List ASRock_Official Joined: 20 Mar 2015 Status: Offline Points: 8787	Post Options Post Reply Quote ASRock_TSD Report Post Thanks(0) Quote Reply Topic: Regarding AB350 Pro4 Chassis Fan Posted: 22 Sep 2017 at 3:47pm
	Dear tsaybird, Greetings, this is ASRock TSD. For AB350 Pro4, there are three chassis fan connector, CHA_FAN1, CHA_FAN2 and CHA_FAN3. CHA_FAN2 and CHA_FAN3 could control both 3-pin and 4-pin fan, but CHA_FAN1 could only control 4-pin fan. Regarding your question, please install a 4-pin fan on CHA_FAN1 to customize the fan setting. If connecting 3-pin fan, it will work at full speed. Here is the specification for your reference as below. http://www.asrock.com/MB/AMD/AB350%20Pro4/index.asp#Specification Besides, please also refer to the following link for the fan type specification and information. http://www.asrock.com/support/faq.us.asp?id=427 Thanks! All the best, ASRock TSD

tsaybird Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 06 Aug 2017 Status: Offline Points: 3	Post Options Post Reply Quote tsaybird Report Post Thanks(0) Quote Reply Posted: 22 Sep 2017 at 3:35pm
	today i have setup more fan for PC, i connected Chassis Fan1,Fan2 and Fan3 is already connected. After booting i found problems if 1,2 fan connected, one of fan RPM is uncontrol, it is just speed full rpm too noise. i have disconnected 1 fan, now is just working controllable, quiet. this problem only full connected Chassis fans connector and discovered. have any idea for this problems ?