NZXT Sentry 3 Fan Controller
 

If you need a new fan controller, the folks at Neoseeker seem to really like the NZXT Sentry 3. Here's a quote from the full review to get you started: The NZXT Sentry 3 fan controller seems to be well built and adds an aesthetic high-tech look that some may find desirable. With a max 15 watts per channel, it should handle even the most powerful case fans.

http://www.hardocp.com/news/2014/06/...an_controller/