I've seen a number of people posting about how exactly to configure the fan hub on the H440 v2, but I'm more concerned with how to get my chassis fans to actually change speed... I currently have my rear 140mm and all 3 front 120s plugged into the fan hub which is in turn plugged into the second SYS header, but changing the SYS header speed seems to have no effect on the speed of those fans? I'd rather not spend $20-40 on a 3rd party fan controller when there should already be that functionality built in to my case... am I missing something?