https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Thu, 23 Apr 2026 14:00:03 +0000 Tue, 31 Dec 2019 01:38:09 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=13293 https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ https://forum.asrock.com/forum_posts.asp?TID=13293&PID=71575&title=asrock-b450-pro4-and-cpu-cooler-problem#71575 Author: Haku_
Subject: 13293
Posted: 31 Dec 2019 at 1:38am

Hello!
I have the following system:

Ryzen 2600
Asrock B450 Pro4
G Skill Ripjaws V 3200 Mhz/ set at 3000 atm from bios/

For my Ryzen CPU I bought an Arctic Freezer 34 eSports Duo cooler and I have a really strange problem with it. So I instaled the cooler and I connected it to cpu_fan1 on my motherboard. When I started the PC I noticed the CPU cooler was very noisy so I investigated further and it seems that one of the fans of my Arctic Freeze is always spinning at max speed/the one at the back/ and cannot be controlled from bios while the other one - front one is fine and can be controlled. Both fans are connected properly to each other /PST/. I tried connecting only one of the fans at a time to the cpu_fan1 and I had the same result. front fan can be controlled while the back fan cannot be and run at max speed. Both fans are with 4 pins. I tried connecting the original ryzen 2600 fan to cpu_fan1 and everything is fine with it too.
Now the really weird part is that I tried connecting the back fan/the problematic one/ of the Arctic to cpu_fan2 and there the fan was working properly and I could control it.
So my question is why I cannot control both fans together when connected to cpu_fan1 header but only one of them and do I have to use the cpu_fan2 for both of them instead ? And what does the Smart Fan Speed Control mean for the MB /since it is missing for cpu_fan1 in the manual/?]]> Tue, 31 Dec 2019 01:38:09 +0000 https://forum.asrock.com/forum_posts.asp?TID=13293&PID=71575&title=asrock-b450-pro4-and-cpu-cooler-problem#71575