CHA_FAN2 cannot control

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   Hello, I have a question about my chassis fan of X470 itx/ac board.
When I connect the same 2 3-pin chassis fan on chassis fan1 and 2, but only fan1 can control the speed.
The other seems like only high speed.
Is there any way I can control it on chassis fan2 too?
If yes, please advise, thank you in advance.

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Adelos Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 11 Nov 2017 Status: Offline Points: 15	Post Options Post Reply Quote Adelos Report Post Thanks(0) Quote Reply Topic: CHA_FAN2 cannot control Posted: 25 Jul 2019 at 4:46pm
	Hello, I have a question about my chassis fan of X470 itx/ac board. When I connect the same 2 3-pin chassis fan on chassis fan1 and 2, but only fan1 can control the speed. The other seems like only high speed. Is there any way I can control it on chassis fan2 too? If yes, please advise, thank you in advance.

paologab Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 21 Nov 2018 Location: Milan Status: Offline Points: 112	Post Options Post Reply Quote paologab Report Post Thanks(0) Quote Reply Posted: 25 Jul 2019 at 5:17pm
	go in the bios, h/w monitor and scroll down. ON cha_fan2 click on auto, than you can choose some profile like silence, performance,... or customize. You can choose also the control DC or PWM. Try what fit you. Then you can also shape the curve below those settings.
	AMD Ryzen 7 2700X w/Wraith prism x470 Taichi bios 3.50 16gb HX432C16PB3K2/16 (hynix H5AN8G8NCJR-UHC) M.2 970 EVO, SATA SSD, 2 SATA HDD AMD Radeon RX 580 8G OC Linux Kernel 5.4 Manjaro Stable XFCE

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 Posted: 25 Jul 2019 at 6:59pm
	Dear faC645lB, Greetings, this is ASRock TSD. About the Chassis fan, Fatal1ty X470 Gaming-ITX/ac supports Smart Fan Speed Control on CHA_FAN1. So only CHA_FAN1 can auto detect if 3-pin or 4-pin fan is in use. If installing 3-pin fan on CHA_FAN2, it will work at full speed. Please refer to the following specification. https://www.asrock.com/MB/AMD/Fatal1ty%20X470%20Gaming-ITXac/index.asp#Specification Thanks! All the best, ASRock TSD

Adelos Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 11 Nov 2017 Status: Offline Points: 15	Post Options Post Reply Quote Adelos Report Post Thanks(0) Quote Reply Posted: 30 Jul 2019 at 5:17pm
	Understood, i will use 4-pin fan instead. Thank you.