Hi.
I have set up my rig with X670 Aorus Elite AX in Define 7 case. Apart from AIO CPU cooling and GPU's own fans, I use stock fans shipped with the case (three Dynamic X2-GP14, 120 mm). They are 3-pin fans, meant to be connected to the in-case fan hub. The hub has its own power supply (SATA) and uses 4-pin connector to communicate with motherboard (only two pins are actually used). MB has 3 sys fan connectors and I used SYS_FAN 3 (because cable length).
Now, their behaviour is weird: when I enter BIOS and set the System 3 (SYS_FAN 3 connector) input to PWM, everything runs quietly, I can control fans' speed, no problem (they run in sync, being seen as a single fan, which is to be expected). But the moment I leave BIOS, they just go to 100% and stay there, no matter what. CPU and GPU fans behave normally.
What's more, Gigabyte Control Center (and any other fan software I tested) see the System 3 as idle at 0 RPM and no matter what I do, they still go brrr.
My theory is that they stop being seen as PWR and simply use voltage, but I have no idea why. What I am doing wrong?
I appreciate any help.
I have set up my rig with X670 Aorus Elite AX in Define 7 case. Apart from AIO CPU cooling and GPU's own fans, I use stock fans shipped with the case (three Dynamic X2-GP14, 120 mm). They are 3-pin fans, meant to be connected to the in-case fan hub. The hub has its own power supply (SATA) and uses 4-pin connector to communicate with motherboard (only two pins are actually used). MB has 3 sys fan connectors and I used SYS_FAN 3 (because cable length).
Now, their behaviour is weird: when I enter BIOS and set the System 3 (SYS_FAN 3 connector) input to PWM, everything runs quietly, I can control fans' speed, no problem (they run in sync, being seen as a single fan, which is to be expected). But the moment I leave BIOS, they just go to 100% and stay there, no matter what. CPU and GPU fans behave normally.
What's more, Gigabyte Control Center (and any other fan software I tested) see the System 3 as idle at 0 RPM and no matter what I do, they still go brrr.
My theory is that they stop being seen as PWR and simply use voltage, but I have no idea why. What I am doing wrong?
I appreciate any help.
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