I'd check the handbook. I'm sure that only monitoring and not speed control is available on all headers -or so it seems. Maybe it's correct that you need 4 pin fans. I disconnected a couple of fans and routed them to the manual speed controller on my case to stop them screaming.... Problem solved!
I'm running a Gigabyte GA-Z77X-UP5 TH, so should be much the same setup.
Cheers, Captain Kayos