I'm working with a Gigabyte X870 Gaming X Wifi7 motherboard and an AMD 9800X3D CPU, housed in a Fractal Define 7 case with a Noctua U12-A cooler. I've got the three stock fans from the Fractal case connected to the 3-pin slots on the fan hub behind the motherboard. The two Noctua coolers are set up with one plugged into a highlighted 4-pin slot next to the power and PWM cables, and the other into the CPU_OPT slot. The PWM cable from the fan hub goes into the CPU_FAN header on the motherboard. After updating to BIOS 8a, I configured all fans to PWM and used the CPU for temperature readings. Even when the CPU temp reaches between 90-95°C, the fans barely escalate beyond 2000 RPM and remain quiet. When I try to ramp them to full speed via the Gigabyte Control Center, it doesn't really seem to work as expected. What am I doing wrong?
1 Answer
You might want to try connecting your U12A fans directly to the CPU fan header with the splitter cable that came with them. Then, plug the fan hub into another header like CPU_OPT. This setup could help ensure that the fans get the right signals to ramp up properly when the CPU temp spikes.
What difference does that make? Don't all the fan headers support 4-pin PWM connections? I thought the hub needs a specific fan in the right slot to allow all the case fans to sync up.