ASRock Taichi AM4 X370 Fan Headers
Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=7736
Printed Date: 19 Jul 2025 at 6:54am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: ASRock Taichi AM4 X370 Fan Headers
Posted By: DunGoneNuts
Subject: ASRock Taichi AM4 X370 Fan Headers
Date Posted: 19 Feb 2018 at 11:52am
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" rel="nofollow - Does anyone know for sure how the fan speed is controlled on the headers for the case fans? Is it true PWM on pin 4 of the header, or is the speed of the fans controlled by voltage changes across pin 4? ------------- Ryzen 9 5900X ASRock X370 Taichi G Skill F4-3200 MSI Armor 2070 MSI SPATIUM 1TB M2 WD 1TB M2 Crucial 500 SSD Corsair AX860i PSU Corsair H115Pro WB Phanteks Enthoo Pro SE |
Replies:
Posted By: VUMeter
Date Posted: 19 Feb 2018 at 9:21pm
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As for CHA_FAN2 (bottom of the board, under the PCIE5 slot), it works as PWM or Voltage mode. I currently have a Noctua NF-A14PWM connected and am controlling it's speed using SpeedFan. I did have a 120mm 3-pin fan from my old Gigabyte case connected and that worked too, with variable speed control. As for the other headers, I am not sure/haven't tested. *edit* It looks like you are asking a more technical question, I don't know my away around testing the connections enough to answer that. Sorry. ------------- X370 TaiChi | 1700X P3.10 stock clocks | (2x 16GB) 32GB FlareX 2400MHz. https://valid.x86.fr/ikadaa" rel="nofollow"> 
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Posted By: DunGoneNuts
Date Posted: 25 Feb 2018 at 2:23pm
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" rel="nofollow - This is what TS responded to my question: the Fan are controlled via voltage PWM I guess in other words......huh? ------------- Ryzen 9 5900X ASRock X370 Taichi G Skill F4-3200 MSI Armor 2070 MSI SPATIUM 1TB M2 WD 1TB M2 Crucial 500 SSD Corsair AX860i PSU Corsair H115Pro WB Phanteks Enthoo Pro SE |
Posted By: kerberos_20
Date Posted: 25 Feb 2018 at 4:23pm
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thats a true pwm yey ------------- http://valid.x86.fr/diq4l4" rel="nofollow">  http://www.userbenchmark.com/UserRun/47132492" rel="nofollow - userbenchmark |