Rishav Posted August 6, 2019 Share Posted August 6, 2019 Hi I have MSI Z390 A PRO motherboard. And want to know about sys_fan headers. Does all 5 Sys_fan headers work on CPU temp or System Temp source? On which Temp Source it will work? Thank you Link to comment Share on other sites More sharing options...
Darklordoo7 Posted August 6, 2019 Share Posted August 6, 2019 Usually the sys_fan headers are controlled by the cpu temp. I have the msi z370 tomahawk and i can only control the fans based on cpu temp. Check your bios on what it says Link to comment Share on other sites More sharing options...
Rishav Posted August 6, 2019 Author Share Posted August 6, 2019 Usually the sys_fan headers are controlled by the cpu temp. I have the msi z370 tomahawk and i can only control the fans based on cpu temp. Check your bios on what it says There is no option to change the temp source in my Bios. I am not sure why it is not that. Now i am wondering which temp source my sys fan header are reading? Link to comment Share on other sites More sharing options...
Rishav Posted August 6, 2019 Author Share Posted August 6, 2019 Usually the sys_fan headers are controlled by the cpu temp. I have the msi z370 tomahawk and i can only control the fans based on cpu temp. Check your bios on what it says Just asking why you have set the temp source as CPU TEMP for your sys fan headers? Why not system/motherboard temp? Don't you think sys fan header will get regulate on chassis temp. And there are so many threads where i am getting diff answers on sys fan header temp. Somebody is saying sys fan header use cpu temp or somebody said it will use motherboard/chassis temp. Which one is correct? Link to comment Share on other sites More sharing options...
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