I'm using an Arctic P12 Max as the fan for my Thermalright Peerless Assassin Mini and it will not go below 1900+rpm in PWM mode. Only way to get it any lower is putting it in DC mode but even then it only goes down to 1700+. The fan is supposed to be able to go all the way down to 200rpm but it just isn't. Did I just get a defective unit or is there some setting I need to change?