B450m4 fan problem,

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   Hi, I'm finishing my server build that uses B450m board with 2700 ryzen in it. I am having a trouble setting up the cooling. I've got custom fan solution with 6 fans running in parallel power straight from 12 rail on psi. They are pwm controlled. Here is the problem, when I am in the bios, and I am setting up the fan curve they respond to the changes corrected. They are connected to fan header 3, with pwm control mode and fan speed set to custom in the bios. But as soon as I click save changes and do the restart, they are back at 100% speed. If I go back to bios, it looks like the setting have been applied but fans are at 100%. As soon as I click one of the fan options they go slow down to the normal speed. No matter what I do as soon as I do that restart fans are 100 speed again. Any ideas?

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Lezion Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 13 Sep 2019 Status: Offline Points: 3	Post Options Post Reply Quote Lezion Report Post Thanks(0) Quote Reply Topic: B450m4 fan problem, Posted: 13 Sep 2019 at 7:38am
	Hi, I'm finishing my server build that uses B450m board with 2700 ryzen in it. I am having a trouble setting up the cooling. I've got custom fan solution with 6 fans running in parallel power straight from 12 rail on psi. They are pwm controlled. Here is the problem, when I am in the bios, and I am setting up the fan curve they respond to the changes corrected. They are connected to fan header 3, with pwm control mode and fan speed set to custom in the bios. But as soon as I click save changes and do the restart, they are back at 100% speed. If I go back to bios, it looks like the setting have been applied but fans are at 100%. As soon as I click one of the fan options they go slow down to the normal speed. No matter what I do as soon as I do that restart fans are 100 speed again. Any ideas?