Dear Ron,
Which fan slot on the motherboard did you connect the fan controller to?
If you connected to the motherboard 3-pin fan header, the hub fans will run at full speed as the 3-pin fan header doesn’t provide PWM function.
Please refer to the installation guide for the fan PWM controller.
https://shop.bitspower.com/index.php?route=product/product&path=4_5&product_id=7745