ab350 pro4 chasis fan1 speed control not working

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   ab350 pro4, the 3-pin (DC mode) fan speed of chasis fan 1 jumper is not adjusted.
chasis fans jumper 2 and jumper 3 have good speed control with 3-pin fan.

Edited by boltless - 16 Apr 2017 at 12:31pm

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boltless Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 02 Apr 2017 Location: south korea Status: Offline Points: 11	Post Options Post Reply Quote boltless Report Post Thanks(0) Quote Reply Topic: ab350 pro4 chasis fan1 speed control not working Posted: 16 Apr 2017 at 12:25pm
	ab350 pro4, the 3-pin (DC mode) fan speed of chasis fan 1 jumper is not adjusted. chasis fans jumper 2 and jumper 3 have good speed control with 3-pin fan. Edited by boltless - 16 Apr 2017 at 12:31pm

y3llo Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 07 Apr 2017 Status: Offline Points: 22	Post Options Post Reply Quote y3llo Report Post Thanks(1) Quote Reply Posted: 16 Apr 2017 at 11:23pm
	Can confirm. I found in a FAQ somewhere that chassis 1 does not work with 3 pin. Other fan connectors work fine with 3 pin.

boltless Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 02 Apr 2017 Location: south korea Status: Offline Points: 11	Post Options Post Reply Quote boltless Report Post Thanks(0) Quote Reply Posted: 17 Apr 2017 at 12:46am
	Confirmed. I should have seen faq in advance. Thank you.

Nerio_Lab Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 19 Nov 2015 Location: Novorossia Status: Offline Points: 28	Post Options Post Reply Quote Nerio_Lab Report Post Thanks(0) Quote Reply Posted: 17 Apr 2017 at 1:57am
	In UEFI choose DC or PWM mode.
	The One

boltless Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 02 Apr 2017 Location: south korea Status: Offline Points: 11	Post Options Post Reply Quote boltless Report Post Thanks(0) Quote Reply Posted: 17 Apr 2017 at 10:04am
	there is no option for choose dc or pwm in bios. according to faq.. just auto detect fan type in chasis fan 2, 3.

ruspartisan Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 24 Apr 2017 Status: Offline Points: 7	Post Options Post Reply Quote ruspartisan Report Post Thanks(0) Quote Reply Posted: 25 Apr 2017 at 12:21am
	If you plan to adjust fan speeds according to CPU temperatures and your cooler's fan is PWM-controlled, you can connect cooler's fan to the problematic header (Chassis fan 1), and connect the case fan to CPU header, and change control method from PWM to DC. It's a dirty hack, but may work.