I posted this in the sgminer thread as well but didn't get a response:

Hello all.  I recently did an xmr test run with sgminer-gm on a 5 rx470 rig, win7, 16.9.2, and everything works fine.  When I switch back to wolf (xmr) or claymore (zcash), those miners no longer have control over fan speed.  I also cannot use watttool or amd settings to control fan speeds.  Has anyone else experienced this?  I did a clean driver removal and reinstall but the fan speeds are still locked at the previous setting when I first ran sgminer-gm.  Help would be greatly appreciated. 

edit: I added auto-fan and temp-target to the conf file instead of a static fan speed and now it seems okay.

update: After switching back to claymore zec miner, there is still no fan control and the speeds are strange.  The speeds are stuck at 40,40,65,65,50.  Seems really odd.

update 1/1/2017:  If I set the fan to a static speed on sgminer before opening claymore, the fans have a minimum speed from my sgminer config file, but claymore's miner and other utilities cannot modify the fan speed. 

Does anyone have any ideas on how to re-enable fan control with mining software besides sgminer?

-Dave