Hello, In my corsair 350D I currently have two AF140's for intake, two SP120's as exhaust on a top mounted h100i, and a single sp120 as a back case exhaust fan. All of these fans are Quiet Edition fans, but I have a very annoying problem with the fan for rear exhaust. I am unable to control its speed, and this thing is running at its maximum RPM (~1300). It's obnoxiously loud and is the only thing keeping my system from being silent. I cannot control its speed via ASUS's fan expert because it is connected into a cpu_opt port, and connecting it to my h100i and monitoring speeds via corsairlink does absolutely nothing. Is there some kind of connection I can purchase to make this fan run at a lower rpm, such as some sort of single fan controller? Could my fan be defective since corlairlink cannot control it? All suggestions are welcome, I am eager to have my system running silently and this is my only obstacle.