The extreme 3 gen 3 does not support OC DNA.. Dont listen to that guy. It works amazing as a fan controller. I have all 12 of my fan (5 PWM) plugged into my mobo and I control their speeds and get readings with this program, I would never use it to OC. But for fan speeds and readings its fantastic. Much more than a "complete waste of space" unless of coarse you use an external fan controller. Then yeah, It's a waste, lol.