I've got an i7-4770S CPU in an AsRock Z87E-itx motherboard. CPU cooler is a Noctua NH-L9i, which has a 4-pin fan that supports PWM. It is plugged into the 4-pin CPU fan header on the Z87E. BIOS is the latest, version 2.30. OS is Windows 8.1 Update 1.
I tried to use the BIOS settings to control the CPU fan, but it seems to do essentially nothing. For instance, I set the fan to be running at 50% power if under 35C, which would theoretically have it at about 1250rpm (the L9i has a max fan speed of ~2500rpm), but it was still running at 1700-1750rpm just as if I had left the BIOS setting to automatic, even though temperatures were reported to be between 29-31C for all cores of the CPU.
However, if I use the AsRock Tuning Utility in Windows 8.1, I can successfully control the FAN speed as advertised. In fact, when I do the fan test, it will go as low as 400rpm.
Any thoughts why the Tuning Utility software works but the BIOS does not? I would prefer to use the BIOS so that I don't have to have the Tuning Utility running in the background and consuming resources all the time.
Any advice appreciated.
I tried to use the BIOS settings to control the CPU fan, but it seems to do essentially nothing. For instance, I set the fan to be running at 50% power if under 35C, which would theoretically have it at about 1250rpm (the L9i has a max fan speed of ~2500rpm), but it was still running at 1700-1750rpm just as if I had left the BIOS setting to automatic, even though temperatures were reported to be between 29-31C for all cores of the CPU.
However, if I use the AsRock Tuning Utility in Windows 8.1, I can successfully control the FAN speed as advertised. In fact, when I do the fan test, it will go as low as 400rpm.
Any thoughts why the Tuning Utility software works but the BIOS does not? I would prefer to use the BIOS so that I don't have to have the Tuning Utility running in the background and consuming resources all the time.
Any advice appreciated.
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