z270 taichi issue in PWM
Printed From: ASRock.com
Category: Technical Support
Forum Name: Intel Motherboards
Forum Description: Question about ASRock Intel Motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=5313
Printed Date: 26 Jul 2025 at 3:44pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: z270 taichi issue in PWM
Posted By: lantony
Subject: z270 taichi issue in PWM
Date Posted: 06 Jun 2017 at 4:23am
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" rel="nofollow - Hi all, this motherboard is great but I have an issue that i am reading around seems to be common: all the 4pin on the motherboard for fan control are working fine except for the CHA FAN 2 which i cannot use at all in PWM mode. It only works in full speed mode, if i try to set the pwm mode, it get simply disabled. I have read of a couple of guys having issues on PWM mode for cha fan 3. What might be this issue? how to solve it? I am running the latest bios (2.10) thanks ------------- Asrock Z270 Taichi v1.30 i5 7600k @ 5ghz 16gb Corsair Vengeance LED 3200 Corsair H80i Zotac 1070 GTX AMP |
Replies:
Posted By: parsec
Date Posted: 06 Jun 2017 at 11:21am
The specifications for the Z270 Taichi state: "CPU_OPT/W_PUMP, CHA_FAN1, CHA_FAN2 and CHA_FAN3/W_PUMP can auto detect if 3-pin or 4-pin fan is in use.". So a four pin PWM fan on the CHA_FAN2 connector should have its speed controlled fine. The CHA_FAN3 connector must be manually configured with its option in the UEFI/BIOS (Chassis Fan 3 Control Mode), to operate in PWM or DC (three pin voltage control) mode. What is the full model name and number of the fan you are using on the CHA_FAN2 connector? Most if not all four pin PWM fans can also have their speed controlled in DC/voltage mode. I have used PWM fans on strictly DC three pin fan connectors, and can control their speeds fine. I don't have your board, and can only go by the manual, which may not be up to date with UEFI updates. You said you try to set the CHA_FAN2 connector to PWM mode. How are you doing that? The manual does not show a Control Mode option for the CHA_FAN2 connector. What fan speed profile are you using for the CHA_FAN2 connector? A custom one or a built in fan speed profile? Have you selected non-default fan speed profiles for the other fan connectors? You also said if you try to set PWM mode, it gets disabled. I don't understand what you mean by that. What gets disabled? ------------- http://valid.x86.fr/48rujh" rel="nofollow"> 
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lantony wrote: