I've been upgrading my computer for the past 3 years. So I have an above average knowledge on PC building. Recently, I've installed all my hardware into a new case, the NZXT Noctis 450 (B/R). The case has a optional fan hub behind the back panel. I love the idea of being able to plug in all my fans into a single area, however, (obviously) the fan speeds cannot be controlled. So now I have six case fans spinning at 100% speed. This is obviously loud. My question is, is it possible to control the fan speed through the fan hub? I would imagine it would involve limiting the voltage to the hub, but I have no idea how to do this. If you can help, could you post a link to whatever component i'll need to purchase? The case fans I'm using are 3x Corsair AF120, x1 Corsair AF140, and 2x Corsair SP140.