*Note The Phanteks Hub. This is not a true PWM hub as stated in the part description. It is a controlled hub for variable voltage fans. I did a lot of reading on the various hubs out there and the motherboard needs. You need to read you user manual and understand the pinouts of your cpu_fan, sys_fan, cpu_opt etc. With my motherboard, and the hub connected to the sys_fan pin, I am able to setup a nice curve based off temperature but adjusted by voltage. If you do not set this up properly you WILL have your fans running full speed.