You are incorrect the hubs and the fans are all pwm, the hubs receive pwm and send it to all other connected pwm fans. As I mentioned manual config in aquasuite ramps fans normally but when in curve mode fans go full blast how does it work in one mode but not the other the issue is not hardware
ok, maybe for the PWM. Was because I couldn't find any hint in the description for PWM. But for the 4 pin: I'm correct. Read the description for the P5 next when you're following the link. It's clearly said here from Aquacomputer:
"...All fan outputs are compatible to PWM fans with
four pin connectors only and feature overload protection."
you can surely use then 3 pin PWM, but then the fans are running always with 100% because of the missing PWM signal line.