You could try this special version of Openhardware monitor. It is specifically made to work with the Alienware fan controller. The regular version of Openhardware monitor does not work with the Alienware controller, only this special version. Openhardware monitor Alienware edition    I have had issues with AWCC on my R10 also, so maybe this will work better for you. Give it a try, see if that solution works for you.
I swapped the fans out for Noctura 12x25 fans. Everything seems fine until the fans seem to freeze up and shut off.  With the fans running system is idling at 45-55 and playing games around 65-75.  the problem is after a few hours the fans just freeze up and throttle down. AWCC will not respond to changes and only restarting will fix the issue. Since these fans are slower I’ve tried to set the offset to 50% and also tried straight line at 50% as well but both scenarios result in the fans freezing. Once this happens temps skyrocket quickly.  With the stock fans the same scenario was occurring but instead of of stopping the fans would just run at max speed and sound like small jet engines trying to lift off. I’ve upgraded to the latest AWC but so far the problem still seems to exist. anyone found a solution for this?
Aurora R10, Fan Freezing